mischance
From Longman Dictionary of Contemporary Englishmischancemis‧chance /ˌmɪsˈtʃɑːns $ -ˈtʃæns/ noun [countable, uncountable] formal UNLUCKYbad luck, or a situation that results from bad luck SYN misfortune If by some mischance the government get elected again, I think taxes will rise.Examples from the Corpusmischance• She had invited Betty to stay by accident, or rather by drunken mischance, at one of those fatal office parties.