mischance

 
Pronunciation: /mɪsˈtʃɑːns/

noun

[mass noun]
  • bad luck: by pure mischance the secret was revealed
  • [count noun] an unlucky occurrence: innumerable mischances might ruin the enterprise

Origin:

Middle English: from Old French mescheance, from the verb mescheoir, from mes- 'adversely' + cheoir 'befall'