ἀφθεγγής
From LSJ
τοῦ δὲ πολέμου οἱ καιροὶ οὐ μενετοί → in war, opportunities won't wait | the chances of war will not wait (Thucydides 1.142.2)
English (LSJ)
ές, speechless, AB 473.
Spanish (DGE)
-ές mudo, AB 473.
Greek (Liddell-Scott)
ἀφθεγγής: -ές, ὁ μὴ φθεγγόμενος, ἄφωνος, Α. Β. 473, 14.