mischance
/ˌmɪsˈtʃɑːns/noun
mass noun
1- bad luck厄运, 坏运气; 不幸：
by pure mischance the secret was revealed.
纯属运气不佳机密泄漏了。
1.1
- count noun an unlucky occurrence不幸事件, 倒霉事：
innumerable mischances might ruin the enterprise.
无数的倒霉事可能毁了这一企业。
词源
Middle English: from Old French mescheance, from the verb mescheoir, from mes- 'adversely' + cheoir 'befall'.