To be averse to something is to have feelings against it, to be disinclined or opposed towards it. Averse can take the preposition to as well as from and usually describes an attitude. To be adverse to something (the only preposition it takes) is to be turned in an opposite direction to that thing or acting against it. Adverse also means ‘opposing or detrimental to one’s interests’ and usually refers to things, not people. A good way to remember the difference is that the prefix of averse is ab, or away and the prefix of adverse is ad, meaning towards. Examples of each are: I am averse to watching a lot of television. / We are dealing with adverse circumstances.
What is the difference between adverse and averse?