τρισύλλαβος
From LSJ
τὸ δ' ἡδέως ζῆν καὶ ἱλαρῶς οὐκ ἔξωθέν ἐστιν, ἀλλὰ τοὐναντίον ὁ ἄνθρωπος τοῖς περὶ αὑτὸν πράγμασιν ἡδονὴν καὶ χάριν ὥσπερ ἐκ πηγῆς τοῦ ἤθους προστίθησιν → but a pleasant and happy life comes not from external things, but, on the contrary, man draws on his own character as a source from which to add the element of pleasure and joy to the things which surround him
English (LSJ)
ον,
A trisyllabic, D.H.Comp.17, A.D.Synt.8.1, Heph.3.2, Luc.Philops.35. Adv. -βως A.D.Pron.78.23.
Greek (Liddell-Scott)
τρῐσύλλᾰβος: -ον, ὁ ἐκ τριῶν συλλαβῶν συγκείμενος, Διον. Ἁλ. π. Συνθ. 17, Λουκ. Φιλοψ. 35· ἐπίρρ. -βως, Ἀπολλών. π. Ἀντωνυμ. 360. -Ὡσαύτως τρισυλλαβιαῖος, α, ον, Τζέτζ. ἐν Κραμ. Ὀξ. Ἀν. τ. 3, σ. 225, 13.