congru- +

(Latin: to agree, to come together, to correspond with; "suitable, proper," from Latin congruentem, congruens, "agreeing, fit, suitable" from congruere, literally, "to come together, to agree, to meet", from com-, "with, together" + gruere, ruere, "to fall, to rush")

incongruously
Related to being inconsistent with something; that is, incoherent and lacking uniformity and not in accord with something or someone.
incongruousness
Unsuitable, strange, unharmonious, or out of place in a particular situation.