避免（obviate的现在分词）
消除（obviate的现在分词）
排除（obviate的现在分词）

[ adj ]
made impossible
<adj.all>

Obviate \Ob"vi*ate\, v. t. [imp. & p. p. {Obviated}; p. pr. &
vb. n. {Obviating}.] [L. obviare; ob (see {Ob-}) + viare to
go, fr. via way. See {Voyage}.]
1. To meet in the way. [Obs.]

Not to stir a step to obviate any of a different
religion. --Fuller.

2. To anticipate; to prevent by interception; to remove from
the way or path; to make unnecessary; as, to obviate the
necessity of going.

To lay down everything in its full light, so as to
obviate all exceptions. --Woodward.

obviating \obviating\ adj. pren.
making impossible or unnecessary.

Syn: preclusive.
[WordNet 1.5]