DICT.TW Dictionary Taiwan

 Tre·ble, v. t. [imp. & p. p. Trebled p. pr. & vb. n. Trebling.]
 1. To make thrice as much; to make threefold. “Love trebled life.”
 2. To utter in a treble key; to whine. [Obs.]
 He outrageously
 (When I accused him) trebled his reply.   --Chapman.