poly- Look up poly- at Dictionary.com
comb. form meaning "many, much," from Gk. poly-, combining form of polys "much" (plural polloi); cognate with L. plus, from PIE base *ple- (cf. Skt. purvi "much," prayah "mostly;" Avestan perena-, O.Pers. paru "much;" Gk. plethos "people, multitude, great number," pleres "full," polys "much, plenty," ploutos "wealth," plethein "be full;" Lith. pilus "full, abundant;" O.C.S. plunu; Goth. filu "much," O.N. fjöl-, O.E. fela, feola "much, many;" O.E. folgian; O.Ir. lan, Welsh llawn "full;" O.Ir. il, Welsh elu "much"), probably related to base *pele- "to spread."