ὠκύπος
From LSJ
ἢ δεῖ σιωπᾶν ἢ λέγειν τὰ καίρια → you should either keep silence or make timely remarks (Menander)
English (LSJ)
(parox.), ον, poet. form of sq., of Apollo, AP9.525.25.
Greek (Liddell-Scott)
ὠκύπος: -ον, σπάνιος ποιητ. τύπος ἰσοδύναμος τῷ ἑπομ., Ἀνθ. Π. 9. 525.
