Lewis Short
(verb) : per-tŏno, ŭi, 1, and
* A., to thunder violently (late Lat.).—Trop.: contra aliquem,to thunder away at any one,Hier. Ep. 53, n. 8: quando vero vox illa pertonuit,id. adv. Helv. 20.—Act., to proclaim aloud, thunder forth, announce: aliquem,Hier. Ep. 61, ad Pammach. 4: gloriam alicujus,Ambros. Serm. Fer. 2, Pentec.
Charlton T. Lewis, Charles Short, A Latin Dictionary