liniment

(noun) A medicinal liquid that is rubbed into the skin to relieve muscular stiffness and pain.

Synonyms: embrocation

Usage: The veterinarian instructed me to apply the liniment to the horse's sore leg twice a day.

Latin

linō (present infinitive linere, perfect active lēvī, supine litum); third conjugation

I daub, besmear, anoint

Suffix
-mentum (plural -menta)

instrument, medium, or result of; e.g. monumentum

I always find it odd when a medicine is called topical. Like it is in the news!
But this is the original meaning of topos - topology, topography -
topical medicine= you put it in that place, where you have the problem.

From Latin topica, from Ancient Greek τοπικός (topikós, “pertaining to a place, local, pertaining to a common place, or topic, topical”), from τόπος (tópos, “a place”).