Identify the sentence that contains an appositive phrase.
a. after three hours on the road, the group spied an oasis.
b. the safari stopped at an oasis, a moist, fertile spot in the desert.
c. ed had always wanted to go on a safari.
d. going on a safari had been ed’s life-long dream.

The answer is B.) The safari stopped at an oasis, a moist fertile spot in the desert.

The appositive phrase is a moist fertile spot in the desert. You can read the rest of the sentence without that part and still have a complete sentence. It describers oasis.

Even though there is no context given here. It is still possible to make a smart guess of the meaning of the word.

Irreparably to me, it looks like the word ir-repairable, suggesting that the word means that it is beyond repair and cannot be saved.

This gives you two likely options:
A : severely or D: permanently

I would guess the option is A.