Lewis & Short

a-strĕpo (ads-, Halm), ĕre, v. n. and a.

  1. I. In gen., to make a noise at or to (only post-Aug.; freq. in Tac.): totum mare immugit, omnes undique scopuli adstrepunt, Sen. Hippol. 1027: adstrepebat volgus diversis incitamentis, Tac. A. 1, 18: volgus clamore et vocibus adstrepebat, id. H. 2, 90.
    As verb act. with acc.: irritis precibus surdas principis aures adstrepebant, Plin. Pan. 26, 2 (Keil, obstrepebant): eadem, Tac. H. 4, 49: quae pauci incipiant, reliquos adstrepere, id. A. 2, 12.
  2. II. Esp., alicui adstrepere, like acclamo, to shout applause to, to applaud, huzza: adstrepebat huic alacre vulgus, Tac. A. 11, 17: haec atque talia dicenti adstrepere volgus, id. ib. 12, 34.