減速 げんそく deceleration #4,217 Meanings noun, takes する, transitive, intransitive, takes の deceleration Its kanji 減 ゲン · へ.る、へ.らす dwindle, decrease, reduce, decline, curtail, get hungry 速 ソク · はや.い、はや-、はや.める、すみ.やか quick, fast