"accordantly joined or related, fit, consistent," c. 1600, from Latin congru-, stem of congruere "agree, correspond with" (see congruent) + -ous. Shakespeare has congrue (v.), from the Latin verb. Related: Congruously; congruousness.
congressman
Congreve
congruence
congruent
congruity
congruous
conic
conical
conifer
coniferous
conject