To have a great deal of importance, presence, power, or sway; to be of great significance or concern, especially when posing a likely threat or danger.
To make threats against (someone); to intimidate.
To endanger (someone or something); to imperil or jeopardize.
To threaten (an evil to be inflicted).
An annoying and bothersome person or thing.
The act of threatening.
A perceived threat or danger.