allude: (refer to)

Chinese people allude to death by saying that the person finally takes his rest.

alternate: (substitute)

The power system runs on the alternating current.

ambience: (the atmosphere of an environment)

The restaurant is not known for its food; people go there mostly for the ambience and the romantic setting provided high aloft in the city.

ameliorate: (get better)

The meeting between the two leaders ameliorated the relationship of Mainland and Taiwan.

amenable: (willing to comply)

He is amenable to do more chores at home as long as he can leave his office early.

amiable: (pleasant)

Ever since our graduation from high school, we have kept up an amiable friendship through emails and telephone calls.

amicable: (friendly)

Fortunately, the divorce is an amicable one without bitter fight over the custody of the children.