ἴησθα

From LSJ

ὡς μήτε τὰ γενόμενα ἐξ ἀνθρώπων τῷ χρόνῳ ἐξίτηλα γένηται → in order that so the memory of the past may not be blotted out from among men by time

Source

French (Bailly abrégé)

épq. c. ἴῃς.

Russian (Dvoretsky)

ἴησθα: эп. 2 л. sing. praes. conjct. к εἶμι.