癒

It is a phono-semantic compound:

疒 (sickness radical, “illness”) – semantic element, indicating relation to disease or healing;

愈 (yu, to recover, to get better) – phonetic element, giving the sound and reinforcing the meaning.

Thus the character expresses “to recover from illness, to heal.”

Semantic range:

- to heal, to cure – 병이 낫다, 치료하다.

- to recover – 회복하다, 병이 호전되다.

By extension: to be soothed, to find relief.

It is widely used in medical, therapeutic, and figurative senses across East Asian languages.

치유 (治癒) – healing, cure.

완치(完治)와 치유(治癒) – distinction between “complete cure” and “healing/therapy.”