arriesgar - to risk, to take a risk

arrodillar - to kneel

arrollar - to roll, to knock down

arrugar - to wrinkle, to crumple up, to crease

arruinar - to ruin, to wreck

asar - to roast

ascender - to ascend, to promote

asear - to clean, to straighten, to tidy up

asediar - to besiege

asentir - to nod

asesorar - to advise, to counsel