electric toothbrush
Common everyday term for a powered toothbrush.
新しい電動歯ブラシを買った。
I bought a new electric toothbrush.
電動歯ブラシは手磨きよりきれいに磨ける。
An electric toothbrush can clean better than manual brushing.
Compound of 電動 (electric-powered) and 歯ブラシ (toothbrush).