Fetching details from the dictionary...

to rub; to chafe; to strike (match); to file; to frost (glass)
to squander (one's money); to run through (one's fortune); to lose money (e.g. by gambling)
ゴマを磨って料理に使う。
Grind sesame to use in cooking.
すり鉢で薬を磨りましょう。
Let's grind medicine in mortar.
墨を磨って字を書きます。
I grind ink to write.