conversant
From LSJ
τέχνη δὲ ἄνευ ἀλκῆς οὐδὲν ὠφελεῖ (Thucydides 2.87.4.6) → η τέχνη απαιτεί κουράγιο, skill without heart is useless
acquainted with: P. and V. ἐπιστήμων (gen.), ἔμπειρος (gen.), V. ἴδρις (gen.); see versed in.
be conversant with: P. and V. ὁμιλεῖν (dat.).