avoid

[1]	shun , keep (away) from , keep off , leave alone , keep/steer clear of , refrain from , dodge , circumvent , sidestep , elude , escape , evade
[2]	debar , forefend , forfend , obviate , deflect , avert , head off , stave off , fend off , ward off
[3]	invalidate , annul , quash , void , nullify