purgative
noun/ˈpɜːɡətɪv/
/ˈpɜːrɡətɪv/
(formal)- a substance, especially a medicine, that causes your bowels to empty synonym laxativeWord Originlate Middle English: from Old French purgatif, -ive, from late Latin purgativus, from purgat- ‘purified’, from the verb purgare ‘purify’, from purus ‘pure’.
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purgative