1. Keep from happening or arising; make impossible
   - forestall, foreclose, preclude, forbid 
2. Stop (someone or something) from doing something or being in a certain state
   "We must prevent the cancer from spreading"
   - keep

Derived forms: prevented, prevents, preventing

See also: prevention, preventive

Antonym: let

Encyclopedia: Prevent

• order Orthoptera
• order Ostariophysi
• Order Osteoglossiformes
• order Ostracodermi
• order Palmales
• order Pandanales
• order Papaverales
• order paper
• order Parietales
• order Passeriformes
• order Pectinibranchia
• order Pediculati
• order Pedipalpi
• order Pelecaniformes
• order Pelycosauria
• order Perciformes
• order Percomorphi
• order Perissodactyla
• order Peronosporales
• order Pezizales
• order Phalangida
• order Phallales
• order Phasmatodea
• order Phasmida
• order Pholidota