Definition of mischancy in US English:

mischancy

(also mischauncy)

adjective

  • Originally: unlucky; unfortunate (chiefly Scottish and Irish English). Now usually: subject to (mis)chance; risky, dubious.

Origin

Early 16th century; earliest use found in Gavin Douglas (c1476–1522), poet and bishop of Dunkeld. From mischance + -y.