σιγαλός

ή, όν, όν, Adv.
A. silent, Hp. Acut. 65, S. Ph. 741, Nicopho 27; disposed to silence, S. Tr. 416; of animals, Arist. HA 488a34; τὰ ἐκ ποδῶν σιγηλὰ σῴζοντες E. Ba. 1049. Adv. ‐λῶς Poll. 5.147.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project