出 is grouped under the 山 radical.
It belongs to a phonetic family with 掘, 堀, and 屈 — they share the 出 component and the reading クツ.
A common word using 出 is 出す (だす), meaning “to take (something) out; to hand in (something)”.
Kanji that look similar include 仙, 両, 山, and 岐.