threatening
adjective /ˈθretnɪŋ/
  /ˈθretnɪŋ/
- expressing a threat of harm or violence synonym menacing
- threatening letters
 - threatening behaviour
 - The house seemed less threatening in daylight.
 
Extra Examples- I found an extremely threatening message on my voicemail.
 - adopting a threatening posture towards an opponent
 
Oxford Collocations Dictionaryverbs- appear
 - be
 - seem
 - …
 
- extremely
 - fairly
 - very
 - …
 
 - (of the sky, clouds, etc.) showing that bad weather is likely
- The sky was dark and threatening.
 
Oxford Collocations Dictionaryverbs- appear
 - be
 - seem
 - …
 
- extremely
 - fairly
 - very
 - …