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parlous [parlous 词源字典]: parlous: see peril
[parlous etymology, parlous origin, 英语词源]
parlor (n.): c. 1200, parlur, "window through which confessions were made," also "apartment in a monastery for conversations with outside persons;" from Old French parleor "courtroom, judgment hall, auditorium" (12c., Modern French parloir), from parler "to speak" (see parley (n.)).

Sense of "sitting room for private conversation" is late 14c.; that of "show room for a business" (as in ice cream parlor) first recorded 1884. As an adjective, "advocating radical views from a position of comfort," 1910.
parlour: chiefly British English spelling of parlor (q.v.).
parlous (adj.): late 14c., late Middle English contraction of perilous.