The adjective "adverse" means "unfavorable to one's interests; harmful."
The adjective "averse" means "reluctant about; opposed to."
I am averse to spending time in the garden because I had an adverse reaction to a bee sting in the past.
Something bad happened the last time I was stung by a bee so I stay out of the garden.
Some people don't like to drive under adverse conditions, but many with 4-wheel-drive vehicles are not averse to driving in snowstorms or on muddy roads.
Some cars have features that can make drivers less concerned about driving in bad weather or on slippery surfaces.
The adverse effects of smoking cigarettes include lung cancer and emphysema; furthermore, I am averse to smelling like an ashtray.
Smoking can cause major illnesses. I don't want my hair and clothes to smell like smoke.
