τεῦ
From LSJ
Περὶ τοῦ ἐπέκεινα τοῦ νοῦ κατὰ μὲν νόησιν πολλὰ λέγεται, θεωρεῖται δὲ ἀνοησίᾳ κρείττονι νοήσεως → On the subject of that which is beyond intellect, many statements are made on the basis of intellection, but it may be immediately cognised only by means of a non-intellection superior to intellection
English (LSJ)
Dor. gen. of σύ (q.v.). II τεῦ, Ion., Ep., and Dor. gen. of τίς; who?, and τευ enclit., gen. of τις, some one, v. τίς, τις.
German (Pape)
[Seite 1101] ion. u. dor. statt τίνος, att. τοῦ, u. τευ, entl., = τινός, att. του, Hom., Her., s. τίς. dor. gen. von τύ, σύ, = σοῦ, Alem.
Greek (Liddell-Scott)
τεῦ: Δωρ. γεν. τοῦ τύ, σύ, Θεόκρ. 5. 19., 7. 27, κλπ. ΙΙ. τεῦ; Ἰων., Ἐπικ. καὶ Δωρ. γεν. τοῦ τίς; ἀλλὰ τευ ἐγκλιτ., γεν. τοῦ τις, Ὅμ., Ἡσ., Ἡρόδ.