What is the meaning of Darkly?

With insufficient light for easy discernment or comprehension

With a dark appearance

In a manner which is not readily visible or noticeable; inconspicuously

In a manner which retards or prevents discernment; clandestinely

In a manner which is difficult to understand, or which retards or prevents understanding; incomprehensibly

In a manner which tends to produce uncertainty or confusion; bewilderingly

In a manner which produces an inward conviction of future misfortune; ominously

In a morbid manner; morbidly, sinisterly

Relating to darkness or obscurity.

Source: wiktionary.org