1) Avert 2) Deflect 3) Prevent 1) Do away with 2) Eliminate 3) Make moot 4) Make unnecessary 5) Preclude 6) Prevent from happening 7) Prevent the occurrence of 8) Render unnecessary 9) Rid of 10) To avoid 
• (v. t.) To anticipate; to prevent by interception; to remove from the way or path; to make unnecessary; as, to obviate the necessity of going. • (v. t.) To meet in the way.
Prevent or forestall
Ob'vi·ate transitive verb [ imperfect & past participle Obviated ; present participle & verbal noun Obviating .] [ Latin obviare ; ob (see Ob- ) + viare to go, from via way. See Voyage .] ...
to make unnecessary get rid of 
[v] - do away with
obviate 1. To anticipate and prevent or to eliminate (difficulties, disadvantages, etc.) by effective measures. 2. To render unnecessary: to obviate the risk of serious injury.
[SAT terms] prevent the occurrence of; prevent from happening prevent the occurrence of; prevent from happening do away with[Intelligent words] do away with