παρεμπολάω
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
English (LSJ)
A traffic underhand in a thing, smuggle it in, π. γάμους dub. in E.Med.910 ; πολίτης παρημπολημένος an intrusive citizen, Com.Adesp.96.