適 is built from the 辶 (walk / road) and 啇 (stem / root (in 適·敵)) components.
It belongs to a phonetic family with 摘, 敵, and 滴 — they share the 啇 component and the reading テキ.
A common word using 適 is 適当 (てきとう), meaning “fitness, suitability”.
Don't confuse it with 摘, 敵, 滴, and 嫡.