συ
From LSJ
εἰ πλείονα δ' εἰδείης Σισύφου → if you were more intelligent than Sisyphus
Greek Monolingual
σύ ΝΜΑ
(προσ. αντων. β’ προσ.) βλ. εσύ.
Russian (Dvoretsky)
συ: (перед σ с последующим согласным, перед ζ и иногда перед ξ) = συν-.
Middle Liddell
I. subst. Pron. of the second pers., thou, you.
2. strengthd. by compos. with the enclit. γε, σύγε, (like ἔγωγἐ thou at least, for thy part, in Hom., etc., doric τύγα Theocr.
II. Dual nom. and acc. σφῶι, you two, both of you, Hom.
III. Pl. ye, you, Hom., etc.,