Strong's #4799: marach (pronounced maw-rakh')
a primitive root; properly, to soften by rubbing or pressure; hence (medicinally) to apply as an emollient:--lay for a plaister.
Brown-Driver-Briggs Hebrew Lexicon:
mârach
1) (Qal) to rub
Part of Speech: verb
Relation: a primitive root
Usage:
This word is used 1 times:
Isaiah 38:21: "Let them take a lump of figs, and lay it for a plaster upon the boil, and he shall recover."