understand
understand — verb
- understandpresent simple I / you / we / they
- understandshe / she / it
- understoodpast simple
- understandinghe / she / it
1. to know what spoken or written words, a language, or a message means
to know what spoken or written words, a language, or a message means
Faisal listened carefully and understood every instruction the pilot gave.
understand + noun phrase (instruction)
Nadia could not understand the question on the application form.
understand + noun phrase (question)
Aylin understands Spanish well but still struggles to speak it fluently.
Eli read the chapter twice before he understood what the author meant.
understand + what-clause
The child nodded to show that she understood the story.
- understand a question
- understand an instruction
- understand what someone means
- understand English/French/German
- comprehend
more formal; used in academic or technical contexts
- grasp
implies making an effort to understand something difficult
- get
informal; common in everyday speech
- misunderstand
to understand incorrectly
- be confused by
to not understand at all
Grammar Patterns
understand + noun phrase (a word, a sentence, a language)
understand + what/why/how/when/who-clause
understand (without object)
Usage Note
Often used with wh-clauses (what, why, how) to specify what is being understood. This is the core sense and the easiest for beginners.
Common Mistakes
2. to grasp the causes of an event, the operation of a device, or the reason behind
to grasp the causes of an event, the operation of a device, or the reason behind a situation
Takeshi finally understood how the motor converts electricity into motion.
understand + how-clause (mechanism)
Isabela understood why the plants had died after the long drought.
understand + why-clause (cause)
Femi could not understand why the bus always arrived twenty minutes late.
The students understood the experiment after the teacher explained each step.
understand + noun phrase (experiment)
Christopher understood the rules of chess after playing one game.
- understand how something works
- understand why something happens
- understand the process
- understand the system
- understand the reason
- comprehend
more formal; common in academic writing
- figure out
informal; implies working through a problem step by step
Grammar Patterns
understand + why/how + clause
understand + noun phrase (the reason, the process, the system)
Usage Note
Frequently used with how and why to explain causes or processes. The object is typically a system, event, situation, or explanation — not a person.
Common Mistakes
3. to notice and appreciate what other people feel, experience, or need, often with
to notice and appreciate what other people feel, experience, or need, often with sympathy
Nellie understood why Eli was upset about missing the family reunion.
understand + why-clause (emotional reason)
Élise understood that her brother needed time alone after the argument.
understand + that-clause (someone's emotional need)
William understood his grandmother's wish to stay in her own home.
understand + noun phrase (someone's wish)
The manager understood that the staff wanted more flexible working hours.
Aylin understood how Faisal felt about losing the competition.
understand + how-clause (empathy toward feelings)
- understand someone's feelings
- understand someone's decision
- understand why someone...
- understand that someone needs...
- empathize with
stronger emotional connection; implies sharing the feeling
- sympathize with
implies feeling pity or sorrow for someone's situation
- relate to
informal; implies a personal connection through similar experience
Grammar Patterns
understand + that-clause
understand + noun phrase (someone's feelings, someone's decision)
understand why + clause (someone behaves a certain way)
Usage Note
When used of people's feelings, this sense carries a tone of sympathy or patience. Distinguish from sense 2 (GRASP MECHANISM): sense 3 is about emotions and human behaviour, not technical causes.
Common Mistakes
4. to interpret what someone says or what a situation signals, especially when that
to interpret what someone says or what a situation signals, especially when that interpretation later proves incorrect
Eric understood that the meeting started at two, but it was actually at three.
understand + that-clause (mistaken belief, corrected)
Faisal understood from her tone that she was angry, but she was simply tired.
Nadia understood the notice to mean the library would be closed for a week.
understand + object + to-infinitive (interpretation)
Christopher understood that the price included delivery, but it did not.
When Takeshi said the project was fine, Isabela understood him to mean it was finished.
understand + object + to-infinitive (interpretation of meaning)
- understand that... (corrected later)
- understand something to mean...
- understand from someone that...
Grammar Patterns
understand + that-clause (where the clause is later revealed to be wrong)
I understood (that)… — often corrected by context or later information
Usage Note
In this sense, the speaker often follows up with information that corrects the mistaken belief. Frequently followed by a that-clause or an object + to-infinitive structure.
Common Mistakes
5. of two or more people: to share an agreement or awareness without needing to sta
of two or more people: to share an agreement or awareness without needing to state everything openly
Faisal and Nadia understood each other without needing to exchange a single word.
reciprocal: understand each other
The two companies understood that the partnership would take at least a year to develop.
understand + that-clause (shared understanding)
Eli and his roommate understood one another perfectly on sharing household chores.
reciprocal: understand one another
The neighbours understood that nobody would park in front of the garage.
After years of working together, the team understood each other's working style.
- understand each other
- understand one another
- understand that... (mutual agreement)
- agree
more explicit; implies stating the agreement openly
- see eye to eye
idiomatic; implies full agreement on a particular matter
- disagree
to have a different opinion or view
Grammar Patterns
understand each other / understand one another
understand + that-clause (shared understanding)
it is understood that... (mutual)
Usage Note
Often uses the reciprocal forms 'understand each other' or 'understand one another'. The understanding may be unspoken — an implicit agreement rather than a formal arrangement.
6. to have learned or inferred from written or spoken information that something is
to have learned or inferred from written or spoken information that something is the case
Eli understood from the email that the office would be closed on Friday.
understand from [source] + that-clause
Christopher understood that the flight would be delayed by two hours.
William understood from the doctor that the test results were all normal.
understand from [person] + that-clause
I understand that you have applied for the position of head librarian.
Aylin understood from the notice that the building would close for repairs.
- understand from someone that...
- understand that... (from information)
- I understand (that)...
Grammar Patterns
understand + that-clause (belief based on information received)
understand + from + noun + that-clause
Usage Note
Common in formal correspondence ('I understand that you wish to…'). The information source can be stated explicitly with 'from + noun phrase'. Distinguish from sense 4 (MISTAKEN BELIEF): sense 6 does not carry the implication of error.
Common Mistakes
7. used as a question or firm instruction to check that someone has fully grasped w
used as a question or firm instruction to check that someone has fully grasped what is being asked and will obey
"You will finish the report by Friday, understand?" the supervisor said firmly.
imperative: 'understand?' as a tag question
"Don't open the door for strangers, understand?" the mother told her child.
The security guard said, "You are not to enter this area, understand?"
imperative: 'understand?' following a prohibition
"I want the kitchen spotless when I return, understand?" the chef ordered.
"Stay with the group at all times, understand?" the tour guide warned everyone.
- command + 'understand?'
- prohibition + 'understand?'
Grammar Patterns
Understand? (as a question or command at the end of an instruction)
Do I make myself understood?
Usage Note
Used mainly in spoken, directive contexts. The speaker sets a firm expectation. A response of 'I understand' confirms compliance. This sense is strongly associated with authority (bosses, parents, officials).
Common Mistakes
❌ 'You clean your room, understand?' said with a soft, questioning tone. — In this sense, 'understand?' is a firm directive, not a polite question. The tone should be authoritative.
8. referring to a social rule or shared expectation that people follow without need
referring to a social rule or shared expectation that people follow without needing an explicit statement
It is understood that students must not use mobile phones during examinations.
passive: 'it is understood that...' (unspoken rule)
In the Wong household, it was understood that everyone helped with the evening meal.
It is generally understood that the rules apply equally to all employees.
passive: 'it is generally understood that...'
In our office, it is understood that meetings begin exactly on the hour.
It was understood that the land belonged to the community, not to any individual.
- it is understood that...
- it is generally understood that...
- it was understood that...
- implied
focuses on the fact that something is suggested without being said outright
- taken for granted
emphasises that nobody questions the assumption
- presumed
slightly more formal; suggests an assumption based on convention
Grammar Patterns
it is understood that... (passive, formal)
it is generally understood that...
it is understood to be...
Usage Note
Almost always in the passive form 'it is understood that…'. The subject is impersonal. This sense appears in formal, legal, and social-rule contexts. Distinguish from sense 5 (MUTUAL AGREEMENT): sense 8 is about general social norms, not a specific arrangement between two people.
To cause someone to think or know something, often indirectly.
The manager gave us to understand that the project was canceled.
Were you given to believe that the meeting would be postponed?
To communicate your meaning clearly, especially when speaking a foreign language.
Sara speaks little French but can make herself understood.
Diego made himself understood using simple words and gestures.
Word family
- understandingnounA2
- understandingadjectiveB1
- misunderstandverbB1
- misunderstandingnounB1
- understoodadjectiveB2
- understandableadjectiveB2
- understandablyadverbB2
Synonym discussion
Sense: verb/1
All four words involve knowing or learning what something means, but they differ in formality and effort. 'Understand' is the most neutral and widely used — it covers everything from hearing a word to grasping a complex idea. 'Comprehend' is more formal and often appears in academic contexts ('the students comprehended the theory'). 'Grasp' adds a layer of effort, suggesting that the understanding came after some difficulty ('she grasped the logic after several attempts'). 'Get' is very informal and common in everyday speech ('I don't get the joke'). 'Figure out' implies a process of working something through step by step ('he figured out how to fix the sink'). In casual conversation, 'understand' and 'get' are interchangeable; in writing or exams, 'understand' and 'comprehend' are preferred.
Common collocations
Nouns
- ability to understand
- difficulty understanding
- way of understanding
Adverbs
- fully understand
- clearly understand
- easily understand
- finally understand
- perfectly understand
Phrases
- make someone understand
- hard to understand
- easy to understand
- fail to understand
Prepositions
- understand from
- understand about
Etymology
The word 'understand' comes from Old English 'understandan', which literally meant 'to stand among' or 'to stand in the midst of'. The idea was that by standing in the middle of something — among its parts, in the middle of a discussion — you could grasp its meaning. The prefix 'under-' here has the sense of 'between' or 'among', not the modern 'below'. This is different from other Germanic languages: compare German 'verstehen' and Dutch 'verstaan', which use a different prefix ('ver-') to convey comprehension.