Main entry: threaten
Definition: to utter intentions of injury or punishment against:"He threatened me when I tried to call the police"
Main entry: threaten
Definition: to be a menacing indication of something:"The clouds threaten rain"
Usage: Danger threatens
Main entry: menace, jeopardise, jeopardize, imperil, peril, threaten, endanger
Definition: pose a threat to; present a danger to
Usage: The pollution is endangering the crops