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Definitions

incompatible

[in-kuhm-pat-uh-buhl] / ˌɪn kəmˈpæt ə bəl /
ADJECTIVE
antagonistic, contradictory
Synonyms
STRONGEST
conflicting inappropriate incongruous inconsistent irreconcilable unsuitable unsuited
STRONG
uncongenial
WEAK
adverse antipathetic antipodal antithetical clashing contrary counter disagreeing discordant discrepant disparate factious inadmissible incoherent inconformable inconsonant inconstant jarring marching to a different drummer mismatched night and day offbeat opposed opposite poles apart unadapted warring whale of difference
Antonyms
STRONGEST
appropriate consistent fitting harmonious proper suitable
WEAK
compatible consonant loving suited well-matched

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"Any war fought without limits is incompatible with the law. It is indefensible, inhumane and devastating for entire populations."

From Barron's • Apr. 6, 2026

"Just as a USB adapter allows devices with different connectors to work together, Floquet magnons could bridge frequencies that would otherwise remain incompatible."

From Science Daily • Mar. 27, 2026

Or they combined the microbes with incompatible products.

From The Wall Street Journal • Mar. 12, 2026

Jesse and I had great chemistry but were ultimately incompatible.

From Los Angeles Times • Feb. 27, 2026

They are of incompatible temperaments, and both need “tranquility for our work.”

From "Vincent and Theo: The Van Gogh Brothers" by Deborah Heiligman

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.