憎 is built from the 忄 (heart (left)) and 曾 (formerly / once) components.
It belongs to a phonetic family with 増, 層, 贈, and 僧 — they share the 曾 component and the reading ゾウ.
A common word using 憎 is 憎い (にくい), meaning “hateful, abominable, detestable”.
Don't confuse it with 贈, 増, 僧, and 層.
