assibilo

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.

as -sībĭlo (ads-), āre, v. n. and a.,

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.