godan verb (-ru), transitive verb
rub; scrape; strike (match); file; frost (glass)
Broad physical sense: rub two surfaces together, scrape, strike a match, file down, or frost glass. The specific meaning depends on the object.
マッチを擦って火をつけた。
I struck a match and lit it.
やすりで金属の角を擦る。
I file down the metal corner with a file.
godan verb (-ru), transitive verb
squander money; run through a fortune; lose by gambling
Used for wasting money, especially through gambling or reckless spending. Often appears as 金を擦る or 財産を擦る.
彼は競馬で有り金を全部擦ってしまった。
He squandered all his money on horse racing.