Lewis & Short

con-sĭlesco, sĭlŭi, 3, v. inch. n., to become still, to be hushed, keep silent, grow dumb (ante- and post-class.), Enn. ap. Paul. ex Fest. p. 58, 9 Müll. (Ann. v. 575 Vahl.); Plaut. Mil. 2, 6, 102; Gell. 5, 1, 6; 12, 1, 22.