• IPA: /ˌɪŋkəmˈpætɪbəl/, /ˌɪnkəmˈpætɪbəl/

incompatible

1. Of two things: that cannot coexist; not congruous because of differences; unable to function together due to dissimilarities.

   Synonyms: irreconcilable

   My phone is incompatible with the latest version of this app.

   • 1788, Publius [pseudonym; Alexander Hamilton], “Number LXXXIII”, in The Federalist: A Collection of Essays, Written in Favour of the New Constitution, […] , volume II, New York, N.Y.: […] J. and A. M‘Lean, […], →OCLC ↗:

     Courts of equity are in many instances so nice and intricate, that they are incompatible with the genius of trials by jury.

2. (chemistry) Incapable of being together without mutual reaction or decomposition, as certain medicines.

• compatible

• French: incompatible
• German: inkompatibel, unvereinbar
• Italian: incompatibile
• Portuguese: incompatível
• Russian: несовмести́мый
• Spanish: incompatible, malavenido

incompatible (plural incompatibles)

1. (medicine, chemistry, chiefly, in the plural) An incompatible substance; one of a group of things that cannot be placed or used together because of a change of chemical composition or opposing medicinal qualities.

   the incompatibles of iron

2. (philosophy) A consequent of a contrary.
   • 2004, Boethius, translated by Eleonore Stump, In Ciceronis Topica:

     Incompatibles are consequents of contraries. For example, sleeping and waking are contraries, and snoring is associated with sleepers. So snoring and waking are incompatibles.