ava-√ sad P. -sīdati (rarely Ā., e.g. Pot. -sideta, [MBh. i, 5184]; impf. -sīdata, [R. iv, 58, 6]) to sink (as into water), [Suśr.]; [BhP.]; to sink down, faint, grow lean [[TS.]; [PBr.]], become exhausted or disheartened, slacken, come to an end, perish, Caus. (p. -sādayat; ind.p. -sādya) to cause to sink (as, into water), [Suśr.]; to render downhearted, dispirit, ruin, [ChUp.]; [MBh.] &c.; to frustrate, [MBh. xii, 2634]; [R. v, 51, 2.]