Noun adversity has 2 senses
  1. adversity, hardship, hard knocks - a state of misfortune or affliction; "debt-ridden farmers struggling with adversity"; "a life of hardship"
    --1 is a kind of misfortune, bad luck, tough luck, ill luck
    --1 has particulars:
     ill-being; catastrophe, disaster; extremity; distress; affliction; victimization; nadir, low-water mark
  2. adversity - a stroke of ill fortune; a calamitous event; "a period marked by adversities"
    --2 is a kind of
    misfortune, bad luck