► 名詞災い  [わざわい]    
meaning:  trouble  rank: 3☆ 
口は災いの
元 ⇨ Mouth is a source of trouble. Careless comments often cause trouble  
(☛ A common phrase)☆ 災い
転じて
福となす ⇨ Turn a misfortune into happiness. A blessing in disguise  
(☛ A common phrase)More examples:- 金は災いをもたらす ⇨ Money brings misfortune
 - 災い転じて福と成す ⇨ Turn a disaster into a blessing