ā-√ yas P. -yasyati, to work hard, exert one's self, weary one's self, [MBh.]; [R.]; [BhP.]; [Hariv.] &c.; to become exhausted, [Hariv.]; [R.] &c.: Caus. P. -yāsayati, to weary, worry; to give pain, torment, [Suśr.]; [MBh.]; [Kathās.] &c.: Pass. of Caus. -yāsyate, to pine away; to consume by grief, [R.] &c.