ἄμβλυ

From LSJ

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

Source

Russian (Dvoretsky)

ἄμβλυ: adv. слабо, плохо (ὁρᾶν или βλέπειν Plat., Arst.; ἀκούειν Plat.).