it depends on the use of the word exit as it is both a noun and a verb. For the verb exit the antonym is enter, and for the noun exit the antonym is entrance.
entering.
Enter
There is no opposite except a lack of insurance.The opposite adjective of insured is uninsured.
There might not be an opposite.
The opposite of continued is actually discontinued.
The opposite of a profit is a loss (negative profit).
The word opposite of entrance is Exit
Exit
exit
exit.
Enter
Exit
To exit
entrance
Opposites include exit, withdraw, leave, or depart.The opposite of "enter" (into a log, field, document) is to erase, remove, or delete."Exit" is an opposite for "enter"
enter
Exit.
This is not an exact analogy, although entrance can be considered the opposite of exit. The "opposite" of minute (small) would be large, big, or huge.