Incompatible /(?)/

In·com·pat·i·ble

Incompatible

a.
  1. Not compatible; so differing as to be incapable of harmonious combination or coexistence; inconsistent in thought or being; irreconcilably disagreeing; as, persons of incompatible tempers; incompatible colors, desires, ambition.
    A strength and obduracy of character incompatible with his meek and innocent nature.
  2. Incapable of being together without mutual reaction or decomposition, as certain medicines. (Chem.)

Phrases & Compounds
Incompatible terms
terms which can not be combined in thought.

Incompatible

n.
  1. An incompatible substance; esp., in pl., things which can not be placed or used together because of a change of chemical composition or of opposing medicinal qualities; as, the incompatibles of iron. (Med. & Chem.)