鉄槌を下す てっついをくだす Meanings Expression, Godan verb to crack down on (e.g. crime, corruption); to deal a crushing blow to; to bring down the hammer on Kanji 鉄 iron. Read as テツ. 槌 hammer; mallet. Read as ツイ. 下 down. Read as くだす. Jinuma: Japanese Dictionary · Word lists