下か面めん

noun

underside; undersurface; inferior surface

Refers to the bottom or lower surface of a physical object. Often used in technical or descriptive contexts. The antonym is 上面 (じょうめん, top surface).

See also: 上面

• 机つくえの下か面めんにガムがついていた。

  There was gum stuck to the underside of the desk.

• この機き械かいの下か面めんには通つう気き口こうがある。

  There is a ventilation opening on the underside of this machine.