Strong’s Hebrew
H4799 — marach
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
מָרַח
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.
1 occurrence in the KJV.
Isaiah 38:21
For Isaiah had said, Let them take a lump of figs, and lay it for a plaister upon the boil, and he shall recover.