side of the face
Refers specifically to the side of the face, often in contexts of being struck or slapped.
See also: 横面
He was punched on the side of the face.
Rare extended use for the side of something; more commonly expressed with 横 or 側面.
There was a scratch on the side of the box.
Compound of 横 (side) + 面 (face), with an emphatic geminate insertion. The reading つら is a colloquial form of 面.