Darkly Meaning in Bengali

What is the meaning of word Darkly in Bengali/Bangla ?

Defenition of word Darkly

• in a threatening, mysterious, or ominous way.
• with a dark color.

Example

“You can't trust him,” said Jacob darkly

Other Meaning of Darkly

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  অস্পষ্টভাবে vaguely darkly inarticulately
  গোপনে in secret in confidence subrosa darkly sub rosa in secrecy
  রহস্যময়ভাবে darkly