different between watchword vs northernyukaghir

English

From Middle English wacche word, wacchworde, morphologically as watch (“guard, sentinel, sentry”) +? word.

watchword (plural watchwords)

A word used as a motto, as expressive of a principle, belief, or rule of action; a rallying cry.
Synonyms: catchword, byword, maxim, mantra, motto
(archaic) A prearranged reply to the challenge of a sentry or a guard; a password or signal by which friends can be known from enemies.
Synonyms: passphrase, password, underword
(Can we find and add a quotation of Sandys to this entry?)

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