köken: From Early Medieval Latin troppus, borrowed from Frankish *þorp (“a cluster, agglomeration", also "collection of houses, village”), from Proto-Germanic *þurpą (“village”), from Proto-Indo-European *trab-, *treb- (“dwelling, room”). Cognate with French trop (“too much”), Piedmontese tròp/trop. More at trop, thorp and troop.
köken: First attested in the Seokbo sangjeol (釋譜詳節 / 석보상절), 1447, as Middle Korean 너무 (Yale: nèmwù), from Middle Korean 넘〯— (Yale: něm, “to surpass”, whence modern 넘다 (neomda)) + -우 (Yale: -wu, adverb-deriving suffix), but now perceived as a single morpheme.
indicating period or circumstance in which something happened or is happening: during, in, under · indicating movement to the other side of something: behind, beyond, over · indicating taking a standing or seated position next to something: at, to
very, extremely · in particular, particularly · synonym of eritellen (“specifying, allocating”)
eş: epätavallisen, erinomaisen, hirveän, huikean, hyvin, huomattavan
köken: eri + -ttäin (distributive plural). Equivalently, from the second infinitive instructive of erittää (“to specify”) (standard erittäen), and erittäin is very likely one of the prototypes for the -ttain suffix in general. Semantic evolution seems to run from senses 3-to-2-to-1.