Word
assert
Phoneticsas·sert, stress on the second syllable
US/əˈsɝt/
UK/ɐsˈɜːt/
Definitions
01to state strongly
C1 · Advanced Formal · Academic
v. to say something clearly and firmly so that others know you are sure it is true.
v. to state a fact or belief confidently and forcefully. Transitive — requires a direct object or a 'that' clause.
“The lawyer continued to assert that her client was innocent despite the new evidence.”
“The report asserts that the current economic downturn is a direct result of global supply chain disruptions rather than domestic policy failures.”
Usage
Often followed by a 'that' clause or a direct noun phrase.
02to use authority
C1 · Advanced Formal
v. to use your power or rights so that people recognise them.
v. to exercise or enforce one's authority, influence, or rights to ensure they are recognised.
“The director had to assert his authority when the team refused to follow the new rules.”
“The central bank moved to assert its independence by raising interest rates despite significant political pressure from the government.”
03to behave confidently
C1 · Advanced Formal
v. to behave in a way that shows you have power and should be respected.
v. to behave in a confident and forceful manner so that one's presence or opinions are taken into account.
“You need to assert yourself in meetings if you want your ideas to be heard.”
“As the youngest member of the board, she found it necessary to assert herself during the heated debates over the merger.”
Usage
Commonly used reflexively as 'assert oneself'.
Synonyms
04programming/electronics
C2 · Proficiency Computing Technical
v. to check that a specific condition is true in a computer program, or to turn on an electrical signal.
v. to verify a logical condition in code or to set a signal line to a specific voltage level.
“The program will stop if the code tries to assert a condition that is false.”
“The system is designed to assert the interrupt signal as soon as the sensor detects a change in pressure.”
Usage
In electronics, the opposite is 'deassert'.
Antonyms
Collocations
Common phrases and expressions where native English speakers use the word “assert” in context.
Verb
01. assert one's authority
“The new manager found it difficult to assert his authority over the experienced team.”
verb + possessive + noun
02. assert one's independence
“As teenagers grow older, they often feel a strong need to assert their independence from their parents.”
verb + possessive + noun
03. assert one's rights
“Citizens must be educated about the legal system so they can effectively assert their rights.”
verb + possessive + noun
04. assert that
“The defense attorney continued to assert that his client was nowhere near the scene of the crime.”
verb + that-clause
Noun
05. failure to assert
“The company's failure to assert its patent rights led to a significant loss in market share.”
noun + infinitive
Adverb
06. assert forcefully
“She had to assert herself forcefully during the meeting to ensure her ideas were heard.”
verb + adv
07. boldly assert
“The scientist boldly asserted that the new data would overturn decades of established theory.”
adv + verb
08. repeatedly assert
“The government has repeatedly asserted its commitment to reducing carbon emissions by 2030.”
adv + verb
Real-World Examples
“Given that Michigan will now have an earlier say in the voting process, some experts have speculated that the swing state could help progressives assert greater influence over the party overall.” “Still, the mass of signatures is the latest indication of entrenched discontent in Canada towards Trump’s policies, which include a push to assert greater US influence over the entire Western Hemisphere.” Etymology
From Latin assertus, perfect passive participle of asserō (“declare someone free or a slave by laying hands upon him; hence free from, protect, defend; lay claim to, assert, declare”), from ad (“to”) + serō (“join, range in a row”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Word family
VERB
NOUN
ADJECTIVE
Domains
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
- Frequency
- Frequent
- Level
- C1 · AdvancedOxford
- Updated
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