懐 is built from the 忄 (heart (left)), 十, 罒 (net (top)), and 衣 components.
It reads エ like 衣, as do 壊 and 依 — learn 衣 once and the family's reading comes with it.
A common word using 懐 is 懐かしい (なつかしい), meaning “dear, desired, missed”.
Kanji that look similar include 憶, 憾, 憤, and 憧.