incommensurate

If one thing is incommensurate with another, it doesn't fit or is out of proportion. If your expensive meal doesn't taste very good, you could say its quality is incommensurate with its cost.

Things that are incommensurate just don't match — they're disproportionate or off-kilter. Your little brother's loud mouth might be incommensurate with his tiny size, and your small appetite could be incommensurate with the enormous banana split in front of you. The commensurate part of this word comes from the Late Latin commensuratus, literally "measured with," or "equal," and the prefix in- means "not."

Definitions of incommensurate

1. adjective

   not corresponding in size or degree or extent
   “a reward incommensurate with his effort”

   synonyms:

   disproportionate

   not corresponding in size, extent, or degree

   incommensurable

   not having a common factor

   unequal

   poorly balanced or matched in quantity or value or measure

   antonyms:

   commensurate

   corresponding in size or degree or extent

   coextensive, conterminous, coterminous

   being of equal extent or scope or duration

   commensurable

   capable of being measured by a common standard

   proportionate

   agreeing in amount, magnitude, or degree

   equal

   having the same quantity, value, or measure as another