inconsistent

[ in-kuhn-sis-tuhnt ]

adjective

1. lacking in harmony between the different parts or elements; self-contradictory:

   an inconsistent story.

   Synonyms: incoherent

2. lacking agreement, as one thing with another or two or more things in relation to each other; at variance:

   a summary that is inconsistent with the previously stated facts.

   Synonyms: irreconcilable, discrepant

3. not consistent in principles, conduct, etc.:

   He's so inconsistent we never know if he'll be kind or cruel.

4. acting at variance with professed principles.
5. Logic. incompatible ( def 4b ).

inconsistent

/ ˌɪnkənˈsɪstənt /

adjective

1. lacking in consistency, agreement, or compatibility; at variance
2. containing contradictory elements
3. irregular or fickle in behaviour or mood
4. Alsoincompatible maths (of two or more equations) not having one common set of values of the variables: x + 2 y = 5 and x + 2 y = 6 are inconsistent
5. logic (of a set of propositions) enabling an explicit contradiction to be validly derived

Derived Forms

• ˌinconˈsistently, adverb

Other Words From

• incon·sistent·ly adverb

Word History and Origins

Origin of inconsistent¹

First recorded in 1640–50; in- ³ + consistent

Synonym Study

Inconsistent, incompatible, incongruous refer to things that are out of keeping with each other. That which is inconsistent involves variance, discrepancy, or even contradiction, especially from the point of view of truth, reason, or logic: His actions are inconsistent with his statements. Incompatible implies incapability of close association or harmonious relationship, as from differences of nature, character, temperament, and the like: actions incompatible with honesty of purpose; qualities that make two people incompatible. Something that is incongruous is inappropriate or out of keeping, often to the point of being ridiculous or absurd: Incongruous characters or situations frequently provide a basis for comedy.

Example Sentences

The US-based group says the Israeli evacuation orders have been “inconsistent, inaccurate, and frequently not communicated to civilians with enough time”, and that they “did not consider the needs of people with disabilities and others who are unable to leave”.

From BBC

Women's safety campaigners and bar staff in Oxford, parts of the West Midlands, Manchester, Coventry, Kent and Brighton all reported concerns to the BBC about inconsistent implementation and staff training, while women's safety organisations in Cornwall, Sheffield and Devon said the scheme had failed to be adopted by many venues there.

From BBC

The Rams seemingly never recovered, looking nothing like the team that had rebounded from a 1-4 start to win three consecutive games and put themselves in a position to eventually take control of an inconsistent NFC West.

From Los Angeles Times

“It can feel transactional, menus can feel overwhelming, product is inconsistent, the wait too long or the handoff too hectic,” he wrote.

From Salon

However, the report claimed this was "inconsistent" with documentary evidence.

From BBC

Related Words

• conflicting
• contrary
• erratic
• illogical
• incompatible
• irreconcilable
• uncertain
• unpredictable