British spelling: to treat, affect, or administer cocaine to someone or something; to become addicted to cocaine.
From 'cocaine' plus the British verb-forming suffix '-ise' (American uses '-ize'). Both derive from Greek '-izein' through Latin, indicating the action of making or becoming.
This verb form belongs to a fascinating British-American spelling divide that goes beyond just '-s' and '-z'—the differences reflect different 18th-century phonetic reforms in each region's linguistic evolution!
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