τί ἦ μοι ταῦτα περὶ δρῦν ἢ περὶ πέτρην → but what is this to me, about an oak or a rock | but what are these things about a tree or a rock to me | why all this about trees and rocks | why all this about what we have nothing to do with | but why am I off on this tangent
-η, -ο, Ν
1. αυτός που έχει τέσσερεις κλώνους
2. αυτός που έχει κλωστεί με τέσσερεις κλωστές, με τέσσερα νήματα.
[ΕΤΥΜΟΛ. < τετρ(α)- + κλῶνος (πρβλ. μονόκλωνος)].