περιθρύβω
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
English (LSJ)
v. περιθρύπτω.
Russian (Dvoretsky)
περιθρύβω: v.l. περι-θρύπτω растирать вокруг, pass. распадаться, рассыпаться Diod.