asfixiar - to suffocate, to asphyxiate
asimilar - to assimilate, to absorb, to take in
asociar - to associate
asolar - to destroy
asolear - to sun, to get sunburnt, to bask in the sun
asumir - to assume
atañer - to concern
atardecer - to get late, to grow dark
atascar - to obstruct, to block