τυχεῖν

From LSJ

ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm

Source

French (Bailly abrégé)

inf. ao.2 de τυγχάνω.

Russian (Dvoretsky)

τυχεῖν: inf. aor. 2 к τυγχάνω.

Dutch (Woordenboekgrieks.nl)

τυχεῖν inf. aor. van τυγχάνω.