ἀσκέειν, περὶ τὰ νουσήματα, δύο, ὠφελέειν, 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
suitability: P. ἐπιτηδειότης, ἡ.
capacity: P. and V. δύναμις, ἡ.
authority: P. and V. ἐξουσία, ἡ.