verbpro-tŏnoPRO-TONO☆ KeepMeaningto thunder forthLewis & Short 1879ModernAs printed, 1879PROTONOLEWIS & SHORTPROTONOpro-tŏno, āre, v. a., I. to thunder forth: tali protonat ira, Val. Fl. 4, 205.Read the whole entry