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

• forbid
• foreclose
• forestall
• preclude

2. (verb) stop (someone or something) from doing something or being in a certain state

• keep

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

2. (verb) stop (someone or something) from doing something or being in a certain state

• blank
• defend
• exclude
• keep out
• shut
• shut out
• hinder
• impede
• hold
• keep away
• rain out
• wash out

1. (verb) stop (someone or something) from doing something or being in a certain state

• allow
• let
• permit

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

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

2. (verb) stop (someone or something) from doing something or being in a certain state

• bar
• prevention
• preventative
• preventative
• preventive
• preventive