What is the greek word for healing?

There isn't one single perfect Greek word for "healing," as the best choice depends on the context. However, some possibilities include:

* ἴασις (iasis): This is a common and broad term referring to healing, cure, or recovery from illness or injury.

* θεραπεία (therapeia): This word means "healing," "treatment," or "therapy," and often implies a more active process of medical intervention.

* ἀποκατάστασις (apokatastasis): This word means "restoration," "reestablishment," or "renewal," and could be used to describe the healing of a wound or a more metaphorical healing of a relationship.

The most appropriate word will depend on the specific nuance you want to convey.