兌 — 换, 乐, 开 （字素部件）

Person (兄) with parted breath (八) above — release, exchange, satisfaction. Phonetic component carrying TAI/EI/ETSU readings. Phonetic component of 説 (theory), 税 (tax), 脱 (undress), 鋭 (sharp), 悦 (joy), 閲 (review).