底 is built from the 广 (house on a cliff), 氏, and 一 components.
It belongs to a phonetic family with 低, 邸, and 抵 — they share the 氏 component and the reading テイ.
A common word using 底 is 底 (そこ), meaning “bottom, sole”.
Don't confuse it with 低, 抵, and 邸.
