abate
to decrease, reduce
abdicate
to give up a position, right, or power
aberrant
Deviating from what is normal
abeyance
temporary suppression or suspension
abject
miserable, pitiful
abjure
to reject, abandon formally
abscission
the act of cutting, the natural separation of a leaf or other part of a plant
abscond
to depart secretly
abstemious
moderate in appetite
abstinence
the giving up of certain pleasures