to hiss , murmur , whisper at or to a thing (only in the post-Aug. poets): alno adsibilat alnus, Claud. Nupt. Hon. et Mar. 68; id. Rapt. Pros. 2, 225: moto adsibilat aëre ventus, Aus.Mos. 258.—As verb act. : serpens animam adsibilat aris, i. e. sibilando amittit, Stat.Th. 5, 578.