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
a primitive root; probably to expand; but used only as a denominative from אֹ֫זֶן; to broaden out the ear (with the hand), i.e. (by implication) to listen: give (perceive by the) ear, hear(-ken). See אָזַן.