acongojar - to distress, to grieve

acotar - to mark off, to make marginal notes or citations

acrecentar - to increase

actualizar - to update

adherir - to adhere, to stick

adolecer - to suffer, to lack

adormecer - to make sleepy, to fall asleep, to turn numb

aducir - to adduce

afectar - to affect, to pretend, to feign