C1verb2K

Assert

UK /["/əˈsɜːt/","/əˈsɜːts/","/əˈsɜːtɪd/","/əˈsɜːtɪŋ/"]/US /["/əˈsɜːrt/","/əˈsɜːrts/","/əˈsɜːrtɪd/","/əˈsɜːrtɪŋ/"]/

Definition

to state clearly and definitely that something is true

In simple words: To state something confidently and firmly.

Examples

  • The scientist needed to assert her hypothesis with concrete evidence.
  • He was able to assert his authority over the team during the meeting.
  • In her essay, she would assert that climate change is an urgent issue.
  • It's important to assert your opinions, even if they are unpopular.
  • He tried to assert himself, but the crowd was too noisy to hear him.

Usage notes

Use 'assert' when you want to emphasize a strong belief or opinion. It's suitable in both spoken and written contexts, but might be too strong for casual conversations. Avoid using it in informal or light-hearted contexts.

Grammar pattern

assert + object

Memory hint

Think of 'assert' as 'a-sure-it' — you're sure about your statement!

Collocations

  • boldly
  • confidently
  • emphatically
  • need to
  • be determined to
  • wish to

Synonyms

  • declare
  • maintain
  • affirm
  • contend
  • insist

Antonyms

  • deny
  • dispute
  • retract

Common mistakes

  • Confused with 'assertive' which indicates a personality trait.
  • Used in passive voice incorrectly, like 'is asserted by'.
  • Misused with intransitive verbs, 'assert' requires a direct object.