(かぶ)

かぶ
noun
lower part, bottom section
direction
1. lower part, bottom section
The lower portion or bottom area of something. Used in descriptions, instructions, and technical contexts to indicate the part that is lower in position.
There is a button at the bottom of the screen.
(かべ)下部(かぶ)(よご)ついていた
There were stains on the lower part of the wall.
The lower part of that bridge is deteriorating, so repairs are needed.

下部(かぶ) refers to the lower portion of an object, structure, or space. Somewhat formal; common in written, technical, and descriptive contexts.

Common collocations

Pair

Opposite is 上部(じょうぶ) (upper part).

Similar words