English Reference

Word

inconsistency

Phoneticsin·con·sis·ten·cy, stress on the third syllable

US/ˌɪnkənˈsɪstənsi/

UK/ɪnkənsˈɪstənsi/

Definitions

01lack of agreement

B2 · Upper Intermediate Countable noun Academic

n. a difference between two statements or facts that should be the same.

n. the state of being self-contradictory or the lack of logical agreement between two or more facts or claims.

“The lawyer pointed out an inconsistency between the witness's two stories.”

“The audit revealed a significant inconsistency between the reported earnings and the actual cash flow recorded in the bank statements.”

Usage

Often used with the preposition 'between' or 'in'.

02unpredictable behavior

B2 · Upper Intermediate Uncountable noun

n. the quality of not staying the same in behavior or quality.

n. the quality of failing to maintain a uniform standard or a predictable pattern of behavior.

“The team lost the game because of the inconsistency of their star player.”

“Critics complained about the inconsistency of the director's work, noting that his brilliant debut was followed by several mediocre films.”

Usage

Commonly used to describe performance, quality, or human character.

Synonyms

unreliabilityvariabilityinstability

Collocations

Common phrases and expressions where native English speakers use the word “inconsistency” in context.

01. inconsistencies in statements

Real-World Examples

“Inconsistency was nearly their downfall last season; they won the most games in WSL2, but also lost six times.”
The Guardian 23 Aug 2026
“Such inconsistency can create confusion for parents and make it difficult to know what's considered safe and appropriate.”
Phys.org 17 Aug 2026

Word family

NOUN

inconsistency(B2)

This entry

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.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL 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: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Frequent
Level
B2 · Upper Intermediate
Updated

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