Source : Webster's Revised Unabridged Dictionary (1913)

Infelicitous \In`fe*lic"i*tous\, a.
   Not felicitous; unhappy; unfortunate; not fortunate or
   appropriate in application; not well said, expressed, or
   done; as, an infelicitous condition; an infelicitous remark;
   an infelicitous description; infelicitous words.

Source : WordNet®

infelicitous
     adj 1: not appropriate in application; defective; "an infelicitous
            remark"; "infelicitous phrasing"; "the infelicitous
            typesetting was due to illegible copy" [ant: {felicitous}]
     2: marked by or producing unhappiness; "infelicitous
        circumstances"; "unhappy caravans, straggling afoot
        through swamps and canebrakes"- American Guide Series
        [syn: {unhappy}]