crazily

IPA/ˈkreɪzɪli/
KK[krˈezəli]IPA/ˈkreɪzɪli/

crazily — adverb

1. Describes an action or decision that shows extremely poor judgment and a complet

1.adverbB1
Definition

Describes an action or decision that shows extremely poor judgment and a complete failure to think sensibly — for example, spending all your savings on something you cannot use.

Example

Rania acted crazily by quitting her job before she had another one lined up.

act crazily + infinitive clause for unreasonable action

It would be crazily risky to put all your savings into a single new business.

modifies adjective: crazily risky

Common collocations
  • act crazily
  • behave crazily
  • crazily risky
  • crazily expensive
  • crazily complicated
  • crazily naive
Synonyms
  • ridiculously

    more common for intensifying adjectives (ridiculously cheap); less charged than crazily

  • absurdly

    slightly more formal; focuses on the lack of logic in the action

  • foolishly

    more neutral and less dramatic; simply means 'in a silly way'

Antonyms
  • sensibly

    describes careful, reasonable behaviour

  • rationally

    describes behaviour based on logic and reason

Grammar Patterns

crazily + verb (act, behave, decide)

crazily + adjective (risky, expensive)

Usage Note

Often used to intensify adjectives (crazily expensive, crazily complicated), similar to 'ridiculously'. Common in informal contexts when criticizing decisions or actions.

Common Mistakes

The children played crazily in the garden.
The children played wildly in the garden.
This describes energetic play, not a stupid decision; use 'wildly' for sense 2 instead.

2. in a way that is full of strong emotion, excitement, or physical energy and not

2.adverbB1
Definition

in a way that is full of strong emotion, excitement, or physical energy and not held back by normal rules or caution — for example, screaming and jumping at a sports event or laughing so hard you cannot stop.

Example

The fans cheered crazily when their team scored the winning goal in overtime.

cheer crazily — crowd behaviour at a sports event

Paloma laughed crazily as the puppy chased its own tail across the kitchen floor.

Common collocations
  • cheer crazily
  • laugh crazily
  • run crazily
  • dance crazily
  • drive crazily
  • celebrate crazily
Synonyms
  • wildly

    very similar meaning; slightly more general and slightly less informal

  • frantically

    adds a sense of panic or desperate urgency that crazily does not carry

  • madly

    overlaps in meaning but is also used for romantic intensity (madly in love)

Antonyms
  • calmly

    describes relaxed, controlled behaviour

  • quietly

    describes behaviour with little noise or energy

Grammar Patterns

crazily + verb (cheer, laugh, run, dance, drive)

Usage Note

Typically modifies verbs describing loud physical actions, emotional reactions, or energetic movement. Frequently appears in informal narratives about parties, celebrations, sports, and play.

Common Mistakes

He crazily believed the rumours about his friend.
He foolishly believed the rumours about his friend.
Believing rumours shows poor judgment (sense 1), not wild physical energy.

3. Describes behaviour or actions that are stereotypically linked to mental illness

3.adverbC1
Definition

Describes behaviour or actions that are stereotypically linked to mental illness — this usage is now widely considered offensive and disrespectful because it reinforces harmful stereotypes.

Example

Romi kept talking crazily to herself on the bus, and other passengers moved away uncomfortably.

talking crazily — behaviour linked to mental illness stereotype

Using the word 'crazily' to describe someone's unusual behaviour is now considered hurtful and offensive.

meta-usage warning against this sense

Common collocations
  • talk crazily
  • act crazily
  • behave crazily
Synonyms
  • irrationally

    neutral and non-offensive; describes behaviour not based on reason

  • erratically

    neutral; describes unpredictable or inconsistent behaviour

Grammar Patterns

crazily + verb (talk, act, behave)

Usage Note

⚠️ OFFENSIVE. Avoid using this sense. It compares everyday behaviour to stereotypes of mental illness, which is hurtful and disrespectful to people with mental health conditions. Preferred alternatives include 'irrationally', 'erratically', 'strangely', or 'unusually' depending on context. Some dictionaries mark this sense as 'offensive' or 'disapproving'.

Common Mistakes

She was acting crazily, so we called her doctor.
She was acting strangely, so we called her doctor.
Using 'crazily' in this way stigmatises mental illness; use a neutral word like 'strangely' or 'unusually'.

Word family

Synonym discussion

Sense: adverb/2

Crazily (in its 'wild or uncontrolled' sense), wildly, frantically, madly, and manically all describe intense, uninhibited behaviour, but each has a different focus. Wildly is the closest synonym and stresses a lack of restraint or order — a crowd might cheer wildly at a concert. Frantically adds a layer of panic or desperate urgency: you search frantically for lost keys, not crazily. Madly overlaps with crazily but is more common in romantic contexts (madly in love) and less tied to physical chaos. Manically suggests an almost feverish, unstoppable energy that can be either productive (working manically on a deadline) or destructive. Crazily is the most informal and broadest of the five — it can describe anything from extreme enthusiasm ('the fans cheered crazily') to reckless physical behaviour ('driving crazily'). For formal writing, wildly is the safest choice.

wildly ↗frantically ↗madly ↗manically

Etymology

Old NorseMiddle EnglishEnglish

Crazily is formed from the adjective 'crazy' plus the adverb-forming suffix '-ly'. 'Crazy' itself comes from 'craze' (a late 14th-century verb meaning 'to break, shatter, or crush') plus the adjective suffix '-y'. The verb 'craze' probably comes from an Old Norse word 'krasa' meaning 'to shatter'. In Middle English, 'craze' described cracked or flawed pottery ('crazed pots'). By the late 16th century, the meaning shifted to 'of unsound mind', possibly through the idea of a person being mentally 'cracked'. The adverb 'crazily' appeared in the 19th century as 'crazy' became more common in everyday speech.