General Antonyms:
* Remain
* Stay
* Return
* Surrender
* Appear
* Present oneself
More Specific Antonyms:
* Submit: If absconding implies fleeing from legal consequences, "submit" suggests voluntarily accepting them.
* Confront: If absconding is to avoid a situation, "confront" suggests facing it head-on.
* Stay put: This emphasizes a refusal to move or leave.
The best antonym will depend on the specific situation in which the word "abscond" is being used.