guise

Etymology 1

From Middle English guise, gise, gyse, from Old French guisse, guise, vise (“guise, manner, way”), from Old Frankish *wīsa (“manner, way, fashion”), from Proto-Germanic *wīsǭ (“manner, way”), from Proto-Indo-European *weyd- (“to see, view, behold, perceive”). Cognate with Old High German wīsa (“way, manner”), Old English wīse (“way, manner”), Dutch wijze (“way, manner”). More at wise.

noun

1. Customary way of speaking or acting; fashion, manner, practice (often used formerly in such phrases as "at his own guise"; that is, in his own fashion, to suit himself.)
   1924, Aristotle. Metaphysics. Translated by W. D. Ross. Nashotah, Wisconsin, USA: The Classical Library, 2001. Aristotle. Metaphysics. Book 1, Part 5. dialecticians and sophists assume the same guise as the philosopher
2. External appearance in manner or dress; appropriate indication or expression; garb; shape.
3. Misleading appearance; cover, cloak.
   Under the guise of patriotism
   Ought we be concerned that our rights to protest are being continually eroded under the guise of enhancing our safety? 13 September 2013, Russell Brand, The Guardian
   This was almost like a behind-closed-doors pre-season friendly in an international guise so it comes as no surprise that England lacked the sort of sharpness and inspiration that would have come with more match practice. 5 September 2020, Phil McNulty, “Iceland 0-1 England”, in BBC Sport

verb

1. (archaic, transitive) To dress.
2. (archaic, intransitive) To act as a guiser; to go dressed up in a parade etc.

Etymology 2

noun

1. (Internet slang) Deliberate misspelling of guys.
   Sup guise? — What's up, guys?