threaten

Verb

• to be a menacing indication of something:"The clouds threaten rain"
  • Danger threatens
    

• to utter intentions of injury or punishment against:"He threatened me when I tried to call the police"

• pose a threat to; present a danger to
  • The pollution is endangering the crops
    

Related words

• Synonyms: 
  endanger , jeopardize , jeopardise , menace , imperil , peril