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louche (adj.)

"dubious, disreputable," 1819, from French louche "squinting," from Old French lousche, lois (12c.) "cross-eyed, squint-eyed, lop-sided," from Latin lusca, fem. of luscus "blind in one eye, one-eyed," from Proto-Italic *luk-sko- "with partial sight, visually handicapped," from PIE *luk- "to see" or *leuk- "light" [de Vaan].

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Definitions of louche

louche (adj.)
disreputable and dissolute, somewhat agreeably;
the louche world of the theater
a louche nightclub
From wordnet.princeton.edu