1. (verb) keep from happening or arising; make impossible

• forbid
• foreclose
• forestall
• prevent

2. (verb) make impossible, especially beforehand

• close out
• rule out

1. (verb) keep from happening or arising; make impossible

• avert
• avoid
• debar
• deflect
• fend off
• forefend
• forfend
• head off
• obviate
• stave off
• ward off
• baffle
• bilk
• cross
• foil
• frustrate
• queer
• scotch
• spoil
• thwart
• block
• blockade
• embarrass
• hinder
• obstruct
• stymie
• stymy
• block
• halt
• kibosh
• stop
• make unnecessary
• save

1. (verb) make impossible, especially beforehand

• eliminate
• obviate
• rid of

1. (verb) keep from happening or arising; make impossible

• forestalling
• forestalling
• obviation
• obviation
• preclusion
• preclusion
• preventative
• preventative
• preventive
• preventive

2. (verb) make impossible, especially beforehand

• obviating
• preclusive