Brusque or stern in manner or appearance: a gruff reply.
Hoarse; harsh: a gruff voice.
[Dutch grof, from Middle Dutch or Middle Low German.] gruff'ly adv., gruff'ness n.
Synonyms: These adjectives mean abrupt and sometimes discourteous in manner or speech. Gruff implies roughness or surliness but does not necessarily suggest rudeness: a gruff reply. Brusque emphasizes rude abruptness: a brusque manner. Blunt stresses utter frankness and usually a disconcerting directness: a blunt refusal. Bluff refers to unpolished, unceremonious manner but usually implies hearty good nature: a bluff and courageous sailor. Curt denotes usually rude briefness and abruptness of speech: a curt letter of rejection. Crusty suggests a rough and forbidding manner that sometimes conceals benevolence of spirit: a crusty old gentlemen who feeds stray cats.
1533, from M.Du. or M.L.G. grof "coarse (in quality), thick, large" (cognate with O.E. hreof, O.N. hrjufr "rough, scabby"). Sense of "rough, surly" first recorded c.1690.