op- — de Vaan
op- 'wealth', the stem of which is regarded as verbal PIE *h3ep- 'to make' by LIV. In fact, a verbal adj. in *-w/- can be reconstructed for other Latin words too (cf lenis, segnis). The verbal root might be ^ o p - lto take' (opto) or *h3ep- 'to work' > 'possess'. The former seems slightly more likely for semantic reasons. BibL: WH II: 209f, EM 461, IEW 780, Leumann 1977: 347, Sihler 1995: 43, LIV l.*h3ep-. —> ops, … — [de Vaan, s.v. op-, p. 442]