δείξει

From LSJ

ἀγεωμέτρητος μηδεὶς εἰσίτω → no one ignorant of geometry may enter, let no one ignorant of geometry enter, let no one ignorant of geometry come in

Source

French (Bailly abrégé)

3ᵉ sg. f. de δείκνυμι;
dat. sg. de δεῖξις.