Etymograph

English

keypair

From key + pair.

A compound of key + pair

Proto-West Germanic *kaiju

Old English cǣġ ‘key’

Middle English keye ‘a key’

English key

Latin pār ‘equal; pair’

Old French paire

Middle English paire ‘two people; a pair’

English pair

Today it means

noun A public key and its associated private key (in public-key cryptography).

Language periods are conventional ranges, not dates for this word.

Etymograph / keypair