Incongruous /(?)/

In·con·gru·ous

Incongruous

a.
  1. Not congruous; reciprocally disagreeing; not capable of harmonizing or readily assimilating; inharmonious; inappropriate; unsuitable; not fitting; inconsistent; improper; as, an incongruous remark; incongruous behavior, action, dress, etc.
    Incongruous denotes that kind of absence of harmony or suitableness of which the taste and experience of men takes cognizance.
    — C. J. Smith.

Phrases & Compounds

Incongruous numbers
two numbers, which, with respect to a third, are such that their difference can not be divided by it without a remainder, the two numbers being said to be incongruous with respect to the third; as, twenty and twenty-five are incongruous with respect to four.