laxative

 
Pronunciation: /ˈlaksətɪv/

adjective

  • (chiefly of a drug or medicine) tending to stimulate or facilitate evacuation of the bowels: laxative drugs the laxative properties of sodium sulphate

noun

  • a medicine which has a laxative effect: he may prescribe a laxative to ease the congestion

Origin:

late Middle English: via Old French laxatif, -ive or late Latin laxativus, from Latin laxare 'loosen' (from laxus 'loose')