Sentence examples similar to a threatening omen from inspiring English sources

Or is it an ominous omen?

He: a threatening, abnormal killer".

Another wields a threatening stick.

"That's a threatening concept for democracy".

A threatening strep infection?

She clearly saw a threatening individual.

Not in a threatening, scolding way".

Was this a blip or an omen?

Is this a good phenomenon or an ill omen?

A good omen.

Not a good omen.