Averse means strongly disinclined towards something. You would rather not, and you feel it.
It always takes to and it always follows the verb, so being averse to change rather than an averse person. It appears constantly in the negative, since not averse to a drink is a very British way of saying yes enthusiastically. Risk-averse is now a standard compound in business. The trap is adverse, which means unfavourable, and adverse weather and averse to weather mean quite different things.
1adjectiveaverseStrongly disinclined towards something.
“He is not averse to a bit of publicity.”
Averse is the participle of avert. Latin aversus means turned away, from āvertō, so somebody averse to a thing has already turned from it.
Latin
aversus
English, today
averse
Built from
From Latin aversus, past participle of averto (“to avert”).
Etymology from Wiktionary, CC BY-SA