atropellar - to knock down, to run over, to abuse
aullar - to howl, to yell, to cry
aunar - to join, to combine
autentificar - to authenticate, to legalize
auxiliar - to help
aventar - to throw, to throw out, to throw air to someone
aventurar - to hazard, to risk, to venture
avergonzar - to embarrass
averiar - to break down
adelantarse - to go ahead, go in advance