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The Collaborative International Dictionary
Aversation

Aversation \Av`er*sa"tion\, n. [L. aversatio, fr. aversari to turn away, v. intens. of avertere. See Avert.] A turning from with dislike; aversion. [Obs.or Archaic]

Some men have a natural aversation to some vices or virtues, and a natural affection to others.
--Jer. Taylor.

Wiktionary
aversation

n. (context obsolete English) A turning from with dislike; aversion.