形 is built from the 开 (open (simplified form)) and 彡 (hair / decoration) components.
It belongs to a phonetic family with 型 and 刑 — they share the 开 component and the reading ケイ.
A common word using 形 is 形 (かたち), meaning “shape”.
Kanji that look similar include 併, 刑, 型, and 発.