rĕsŏnus

a, um, adj.

resono

I. resounding, re-echoing (poet.): voces, Ov. M. 3, 496: valles, Luc. 7, 480: ictus, Val. Fl. 1, 618: ripae, Sil. 6, 285: resonas plaudere caetras, id. 3, 348.
Lewis & Short
A Latin Dictionary, 1879
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