either etymology

English word either comes from Proto-Indo-European *kʷís, Proto-Indo-European *kʷ-, Proto-Indo-European *-teros (Contrastive or oppositional adjectival suffix.), English whether, English ay, Old English æghwæþer (Each (of two).)

Detailed word origin of either

Dictionary entryLanguageDefinition
*kʷís Proto-Indo-European (ine-pro) Who, what (interrogative). Who, which, that (relative) Which, what.
*kʷ- Proto-Indo-European (ine-pro)
*-teros Proto-Indo-European (ine-pro) Contrastive or oppositional adjectival suffix.
whether English (eng) (obsolete) Which of two. [11th-19th c.] (obsolete) Which of two. (obsolete) Introducing a direct interrogative question (often with correlative or) which indicates doubt between alternatives.. Used to introduce a disjunctive adverbial clause which qualifies the main clause of the sentence (with correlative or).. Used to introduce an indirect interrogative question that consists of multiple [...]
ay English (eng) ("yes") (question tag) (archaic, poetic, _, or, _, Northern England) Always; ever; continually; for an indefinite time. ("yes"). Ah! alas!.
æghwæþer Old English (ang) Each (of two).
*kʷey Proto-Indo-European (ine-pro)
ǣġþer Old English (ang)
*hwē Proto-Germanic (gem-pro) How, with what, by what means;.
*kʷóteros Proto-Indo-European (ine-pro) Which of two.
*hwaþeraz Proto-Germanic (gem-pro) (interrogative) which, what (of two).
hwæþer Old English (ang) Which (of the two).
either Middle English (enm) Both of two members of a group.. Each of two members of a group.. Either of two members of a group. Both, all, or any of a set.. Each of a group. Both of two.. Each of two.. Either of two.
either English (eng) (obsolete) Both, each of two or more.. One or other of two people or things. (coordinating) Used before two or more not necessarily exclusive possibilities separated by "or" or sometimes by a comma.. Each of two. [from 9th c.]. One or the other of two. [from 14th c.] Introduces the first of two options, the second of which is introduced by "or". (conjunctive, after a negative) As well.

Words with the same origin as either

Descendants of *kʷís
anywhere college complete contact count country couple court cover everywhere how however neither right somewhere what when where whether which who whom whose why
Descendants of *kʷ-
elsewhere nowhere quality sins weather whenever wherever whoa whoever
Descendants of *-teros
administration administrative administrator after afterlife afternoon afterward afterwards headmaster hysterical maestro master mastermind masterpiece minister ministry missus mister mistress neutral rendezvous ultra