Dark"ly, adv.
1.
With imperfect light, clearness, or knowledge; obscurely; dimly; blindly; uncertainly.
What fame to future times conveys but darkly down.
Dryden.
so softly dark and darkly pure.
Byron.
2.
With a dark, gloomy, cruel, or menacing look.
Looking darkly at the clerguman.
Hawthorne.
© Webster 1913.