Edgy

wiktionary

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From edge +‎ -y. Compare German eckig(“angular, edgy”).

etymonline

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edgy (adj.)

"having sharp edges," 1755, from edge (n.) + -y (2). Meaning "tense and irritable" is attested by 1837, perhaps from notion of being on the edge, at the point of doing something irrational (a figurative use attested from c. 1600). Related: Edgily; edginess.