† misadventurouslyadv.Obsoleterare by misadventure; unfortunately.
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the world > action or operation > adversity > calamity or misfortune > [adverb] > by mischance
casuallyc1405
mishaply1485
misadventurously1632
1632 Earl of Strafford in R. Browning Life (1891) 300 I am hartely sorrye for him and for myself too, that..should thus misaduenturousely light vpon a man, that [etc.].