Disaster
Misfortune
noun
わざわい
災い (わざわい) Disaster, Misfortune
災難 (さいなん) Misfortune, Calamity, Disaster
災害 (さいがい) Natural Disaster, Disaster, Accident
火災 (かさい) Fire Disaster, Conflagration
震災 (しんさい) Earthquake Disaster
遭難 (そうなん) Disaster, Shipwreck, Accident, Being Stranded
惨事 (さんじ) Disaster, Tragedy, Gruesome Event
幸い (さいわい) Happiness, Luck, Fortune
幸い さいわい and 災い わざわい sound similar but are complementary opposites.
I was わざ happy. Why わい did this Personal Disaster have to happen to me?