at (approximately) the same moment, when, while, as · than · To the same degree that, as (distinguished from the aforementioned use in that comparison was between equals)
eş: wie, während
köken: From Middle High German alles, from Old High German also, alsō (“as, like”); equivalent to all + so. Compare English as.
once (one, and only one, time) · once, once upon a time (at some time in the past; formerly) · a word emphasizing a reason or cause for something: when, since, because (often preceded by a conjunction like kun)
köken: Inherited from Old Galician-Portuguese asemade (13th century). Ultimately from Latin ad (“at”) + summatim (“summarily”).
Etimoloji
From Proto-Indo-European *sm̥meh₁lom (“one time”), from *sem- (“together”) and *meh₁-lo- (“measure, time”), from *meh₁- (“to measure”). See each for cognate words.