GRE Sample Test 1 Verbal Reasoning 2

You would expect “the colossal meal” to fill someone up, but the sentence says that “failed to…her voracious appetite.” Thus, she was not full, and the meal failed to satisfy. Satiate and allay are the best match.
Cadge and mendicate mean the meal begged her hunger. Exacerbate and provoke go in the wrong direction.