adjective “coming quite or nearly up to” i.e. like, similar, equal DN.i.239 (andha-veṇ˚); MN.i.432 (taruṇ˚ a young looking fellow); AN.iv.11 udak˚ puggala a man like water); Pv.i.1#1 (khett˚ like a well cultivated field; = sadisa Pv-a.7); Pv-a.2, Pv-a.8 etc
■ Note. ūpama metri causa see ū˚ and cp. opamma & upamā.

compar
■ superl. formation fr. upa, cp. Lat. summus fr. *(s)ub-mo