köken: From 置(お)き (oki, 連(れん)用(よう)形(けい) (ren'yōkei, “stem or continuative form”) of the verb 置(お)く (oku, “to leave or place in a certain state”)) + 忘(わす)れる (wasureru, “to forget”). From Classical Japanese 置(お)き忘(わす)る (okiwasuru).
köken: Inherited from Vulgar Latin *oblītāre (“forget”), a frequentative based on Latin oblīvīscor (via its past participle oblītus). Compare Aromanian ultari. The second sense of "to look at", used reflexively, may have arisen through its use in an expression "a se uita pe sine", to forget oneself, by extension to remain still, and finally to look (compare semantic evolution of Spanish fijarse as a…