gashi-gashi
Rough, aggressive scrubbing or scratching — vigorously washing your hair, scraping ice off a windshield, or scratching something hard.
💡Shampooing hair energetically — 'He washed his hair gashi-gashi.'
頭をがしがし洗った。
I washed my hair gashi-gashi.
He ___ scrubbed the grime off the old bicycle chain.
古い自転車のチェーンの汚れを○○こすり落とした。