Direct Opposites:
* Release: To set free from something that holds or confines.
* Emerge: To come out of something that covers or surrounds.
* Withdraw: To move back or away from something.
More Specific Antonyms:
* Exclude: To keep something out.
* Repel: To push away or drive back.
* Disperse: To scatter or spread out.
* Isolate: To separate from others.
* Expel: To force out or remove.
* Free: To release from restraint or captivity.
Figurative Antonyms:
* Ignore: To pay no attention to something.
* Dismiss: To reject or disregard something.
* Overlook: To fail to notice something.
The best antonym for "engulf" will depend on the specific situation and the meaning you want to convey.