lenitive
An analgesic or other source of relief from pain
It is now full time to free him from all these necessities, and to apply cordials and lenitives, after those severities which have already had their full course against him.
A laxative.
Where it comes from
From Latin lēnīt(us) (“softened”) + -ive, from lēniō (“to soften, soothe”), from lēnis (“soft”).
Adapted from the Wiktionary entry lenitive (CC BY-SA 4.0).