κουρότερος
From LSJ
θοῦ, Κύριε, φυλακὴν τῷ στόµατί µου καὶ θύραν περιοχῆς περὶ τὰ χείλη µου → set a guard over my mouth, Lord; keep watch over the door of my lips | set a guard, O Lord, over my mouth; keep watch over the door of my lips (Psalm 140:3, Septuagint version)
English (LSJ)
α, ον, Comp. form of κοῦρος (A) (cf. βασιλεύς, -λεύτερος),
A young, opp. elder, Il.4.316, Od.21.310, Hes.Op.[447]: as fem., A.R.1.684.