Etymology
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obviation (n.)

c. 1400, obviacioun "encounter, contact; exposure," from Medieval Latin obviationem (nominative obviatio), noun of action from past-participle stem of obviare "act contrary to, go against" (see obviate).

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Definitions of obviation

obviation (n.)
the act of preventing something by anticipating and disposing of it effectively;
Synonyms: forestalling / preclusion
From wordnet.princeton.edu