justify
Word family
- justificationnounB2
- justifiableadjectiveB2
- justifiablyadverbC1
- unjustifiedadjectiveC1
- unjustifiableadjectiveC2
Synonym discussion
Sense: verb/1
Justify is the most common word for showing that something is reasonable by giving good reasons. Defend is more general — you can defend a position with arguments, but you can also defend a person from physical attack. Warrant is narrower and is often used when the result or situation itself provides the reason rather than a person doing so (e.g. 'The data warrants further investigation'). Substantiate is the most formal of the four and focuses on providing evidence or proof rather than moral or practical arguments (e.g. 'He could not substantiate his claim with any documents'). In academic writing, justify is used for explaining why a method or choice is appropriate, while substantiate appears when presenting evidence. For everyday use, justify and defend are the most natural choices.
Common collocations
Phrases
- find it hard to justify
- be difficult to justify
- can be justified
- cannot be justified
Prepositions
- to (justify to someone)
- by (justify by doing something)
- for (justify for an action — in sense 2)
Etymology
Justify comes from Latin justificare, formed from justus (right, just) and facere (to make). The original meaning was 'to make just or right.' It entered English through Old French justifier in the 1300s. The typography sense (sense 3) developed in the 1600s from the idea of making lines of text 'even' or 'right' at the margins.