Stinking

wiktionary

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From Middle English stynkynge, stinkinge, stinkinde, stinkende, stynkande, stynkand, from Old English stincende, from Proto-Germanic *stinkwandz(“stinking”), present participle of Proto-Germanic *stinkwaną(“to stink”), equivalent to stink +‎ -ing. Cognate with Dutch stinkend(“stinking, stinky”), German stinkend(“stinking, stinky”), Danish stinkende(“stinking, stinky”), Norwegian stinkende(“stinking, stinky”).

From Middle English stinkinge, stynkynge, equivalent to stink +‎ -ing.

etymonline

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stinking (adj.)

late 14c., earlier stinkend, from Old English stincende; present-participle adjective from stink (v.). Modifying drunk, first attested 1887; stinking rich dates from 1956.