IPA: /ˈæd.vɜːr.s.nəs/
KK: /ædˈvɜrsnəs/
The condition of being unfavorable or harmful, often causing difficulties or obstacles.
The adverseness of the weather conditions forced us to cancel the outdoor event.
Adverseness is formed from "adversus" (meaning turned against) and the suffix "-ness" (meaning the state or quality of). The word describes the state of being opposed or unfavorable.
Think of being 'turned against' ('adversus') something, and the '-ness' indicates a state. This helps you remember that 'adverseness' refers to a state of opposition or unfriendliness.