Pronunciation: /ɡʌɪz /
noun
An external form, appearance, or manner of presentation, typically concealing the true nature of something: he visited in the guise of an inspector sums paid under the guise of consultancy fees
Origin
Middle English: from Old French, of Germanic origin; related to wise2.

photo by John Wattie
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Don Don Donatelli said, "Dis guy's not too wise. It's clear dat hat is not his size. He borrowed those clothes to visit us here in the guise of someone we knows."