menace

Short definition from Wiktionary

Noun

1. 1
   A perceived threat or danger.
2. 2
   The act of threatening.
3. 3
   An annoying and bothersome person or thing.

Verb

1. 1
   To make threats against (someone); to intimidate.
2. 2
   To threaten (an evil to be inflicted).
3. 3
   To endanger (someone or something); to imperil or jeopardize.