From Latin aversus, past participle of avertere.

• (RP) IPA: /əˈvɜː(ɹ)s/

averse

1. Having a repugnance or opposition of mind.

   Synonyms: disliking, disinclined, fromward, unwilling, reluctant, loath

2. Turned away or backward.
   • 1697, Virgil, translated by John Dryden, The Works of Virgil: Containing His Pastorals, Georgics, and Æneis. […], London: […] Jacob Tonson, […], →OCLC ↗:

     The tracks averse a lying notice gave, / And led the searcher backward from the cave.

3. (obsolete) Lying on the opposite side (to or from).
4. (heraldry) aversant; of a hand: turned so as to show the back.

• avert
• aversion

• Spanish: opuesto

averse (averses, present participle aversing; simple past and past participle aversed)

1. (transitive, obsolete, rare) To turn away.