amargar - to spoil, to make bitter (persona)
amarrar - to tie up, to fasten, to moor
amartillar - to hammer
amasar - to knead, to mix, to amass
ampliar - to enlarge, to extend, to increase
analizar - to analyze
anotar - to write down, to make a note, to annotate
anular - to annul, to cancel, to rescind
añejar - to age, to mature (vino, queso)
añorar - to be homesick, to miss, to long for