Lewis Short
(verb) : af-frĕmo (better adf-), ĕre, 3
* To roar, rage, growl, or murmur at (only in post-Aug. poets): adfremit his (Mars),Val. Fl. 1, 528: Boreas stridentibus adfremit alis,Sil. 14, 124.
Charlton T. Lewis, Charles Short, A Latin Dictionary