ἄκαμνος
From LSJ
ἢ δεῖ σιωπᾶν ἢ λέγειν τὰ καίρια → you should either keep silence or make timely remarks (Menander)
English (LSJ)
ον, A unwearied, prob. f.l. for ἀκάμας, PMag.Berol.2.91.
Spanish (DGE)
-ον
incansable, infatigable de Helios Hymn.Mag.11.17 (pap.).