back (of a person); one's back
Refers specifically to the human back as a body part. Often used in medical or descriptive contexts.
He felt a slight pain in his back.
Used for the back or rear side of objects, such as furniture, devices, or buildings. More formal than 後ろ.
Please keep the back of the refrigerator a little away from the wall.
back pain
back blow method
Compound of 背 (はい, 'back') and 部 (ぶ, 'part'). A straightforward Sino-Japanese formation.