The correct answer is soothe.
The correct answer is (D) To soothe (person, feelings, pain); to pacify, appease; or make milder; to lessen a pain or an emotion; to satisfy a hunger, thirst, or other desire.
Assuage comes from Middle English aswage, Old French asouager (to reduce in amount), Latin ad- (to) and suavis (sweet).
Examples of use:
- She attempted to assuage his hurt feelings.
- They were able to do little to assuage her grief.