-ard \-ard\, -art \-art\ The termination of many English words; as, coward, reynard, drunkard, mostly from the French, in which language this ending is of German origin, being orig. the same word as English hard. It usually has the sense of one who has to a high or excessive degree the quality expressed by the root; as, braggart, sluggard.

Source: Webster's Revised Unabridged Dictionary (1913)