threaten

[1]	intimidate , endanger , jeopardize , menace , terrorize , jeopardise , menace , daunt , cow , imperil , peril , bully , browbeat , warn , caution
[2]	imperil , put at risk , endanger , jeopardize , put in jeopardy
[3]	impend , loom , augur , portend , presage , forebode