What is an antonym for smite?

There isn't one perfect antonym for "smite" because the word carries a specific connotation of forceful and often divine punishment. However, depending on the context, you could use:

For the physical act of striking:

* Spare

* Protect

* Shield

* Heal

* Comfort

For the divine punishment aspect:

* Forgive

* Bless

* Merciful

* Compassionate

* Grace

The best antonym will depend on the specific situation and the meaning you're trying to convey.