Source : Webster's Revised Unabridged Dictionary (1913)

Congruous \Con"gru*ous\, a. [L. congruus, fr. congruere to come
   together, to coincide, to agree. Of uncertain origin.]
   Suitable or concordant; accordant; fit; harmonious;
   correspondent; consistent.

         Not congruous to the nature of epic poetry. --Blair.

         It is no ways congruous that God should be always
         frightening men into an acknowledgment of the truth.
                                                  --Atterbury.

Source : WordNet®

congruous
     adj 1: corresponding in character or kind [syn: {congruent}] [ant:
            {incongruous}]
     2: suitable or appropriate together