köken: Inherited from Old East Slavic вънъ (vŭnŭ), from Proto-Slavic *vъnъ. Cognate with dialectal во́нки (vónki, “out”), Old Church Slavonic вънъ (vŭnŭ, “out”), Ukrainian во́нка (vónka, “out”), Bulgarian вън (vǎn, “out”) (also въ́нка (vǎ́nka)), Serbo-Croatian ва̏н (“out”), Slovene vèn (“out”) (tonal orthography), Czech ven (“out”), Slovak von (“out”), Old Polish wen (“out”), Upper Sorbian won (“out”),…
each · individually, severally, singly · one by one
köken: Lexicalization of the obsolete adverb egyen (“one by one, separately”) + -ként (essive-formal case suffix), from egy (“one”) + -en (case suffix). First attested in 1531.
köken: From Proto-Indo-Aryan *wí, from Proto-Indo-Iranian *wí, from Proto-Indo-European *wí. Cognate with elements of Hittite 𒈾𒃾 (na-wi, “not yet”) and Old English wiþ (English with).
From Middle High German enzwei, entzwī, inzwī, untzwī, from Old High German in zwei. The first syllable does not originate from the prefix ent-, but was obviously influenced by it (compare the verb entzweien). Cognate with Middle Low German entwei, intwei, untwey.