lax ‧ a ‧ tive /ˈlæksətɪv/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Medieval Latin ; Origin: laxativus , from Latin laxare 'to loosen' , from laxus ; ⇨ ↑ LAX ]
a medicine or something that you eat which makes your ↑ bowel s empty easily
—laxative adjective