(亦作 death by misadventure)[mass noun](Law)death caused by a person accidentally while performing a legal act without negligence or intent to harm (律)意外致死
an unfortunate incident; a mishap 不幸事故;不幸遭遇;灾难 the petty misdemeanours and misadventures of childhood. 孩提时代的小过错和小灾难。
语源
Middle English (in sense 2): from Old French mesaventure, from mesavenir 'turn out badly'