1.
face
The front of the head (colloquial/rude).
面 has two senses: (1) face (colloquial/rough), and (2) surface of a material.
SENSE 1 — FACE:
More rude than 顔. Typically used in negative or aggressive contexts.
EXPRESSIONS:
- 面の皮が厚い: shameless, thick-skinned
- どの面さげて: how dare you show your face
- いい面の皮だ: what nerve / serves you right
SENSE 2 — SURFACE:
Refers to the outer face of a material, especially in craftsmanship and construction.
- 板の面: the surface of a board
- 壁の面: wall surface
ALTERNATE READINGS OF 面:
- 面: mask, face (in compounds like 仮面)
- 面: front side, surface (formal)