prevent (v.)
- abort
- anticipate
- arrest
- avert
- avoid
- baffle
- balk
- ban
- bar
- block
- check
- control
- curb
- dam
- debar
- deflect
- delay
- deny
- deter
- disallow
- discourage
- dishearten
- embargo
- enjoin
- estop
- exclude
- fend
- foil
- forbid
- foreclose
- forestall
- frustrate
- hamper
- help
- hinder
- impede
- inhibit
- intercept
- interdict
- interrupt
- mitigate
- obstruct
- obviate
- outlaw
- preclude
- prohibit
- proscribe
- refuse
- reject
- repel
- repress
- restrain
- retard
- save
- slow
- suppress
- taboo
- thwart
- ward