To transform or convert something into something else, especially through a seemingly magical or mysterious process.
From alchemy + -ize suffix (Greek -izein, meaning 'to practice or perform'). The -ize suffix is standard in American English for creating verbs from nouns.
While 'alchemise' is British and 'alchemize' is American, both spellings are relatively modern—medieval texts would use 'alchemic' as a verb. This shows how English speakers reinvent old words to fit new grammar patterns.
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