1. Made impossible
   - preclusive

1. Do away with
   - rid of, eliminate 
2. Prevent the occurrence of; prevent from happening
   - debar, forefend, forfend, deflect, avert, head off, stave off, fend off, avoid, ward off

See also: obviation, preventative, preventive

Type of: forbid, foreclose, forestall, preclude, prevent

Antonym: necessitate

• internal medicine
• internal organ
• internal representation
• internal respiration
• internal revenue
• internal revenue agent
• Internal Revenue Service
• internal rhyme
• internal secretion
• internal spermatic artery
• internal-combustion engine
• internalisation
• internalise
• internality
• internalization
• internalize
• internally
• internasal suture
• international
• international affairs
• international ampere
• International Association of Lions clubs
• International Atomic Energy Agency
• International Bank for Reconstruction and Development
• international candle