D defs.my
Entry 2 senses Webster, 1913

Sinistrously

/(sĭn"ĭs*trŭs*ly̆)/ · Sin·is·trous·ly · IPA /ˈsɪnɪstɹəsli/
01 adv. In a sinistrous manner; perversely; wrongly; unluckily.
  1. 1.
    In a sinistrous manner; perversely; wrongly; unluckily.
  2. 2.
    With a tendency to use the left hand.
    “Many, in their infancy, are sinistrously disposed, and divers continue all their life left-handed.” Sir T. Browne.