1. (

• baleful ,
• forbidding ,
• menacing ,
• minacious ,
• minatory ,
• ominous ,
• sinister ,
• threatening

) threatening or foreshadowing evil or tragic developments; "a baleful look"; "forbidding thunderclouds"; "his tone became menacing"; "ominous rumblings of discontent"; "sinister storm clouds"; "a sinister smile"; "his threatening behavior"; "ugly black clouds"; "the situation became ugly" ;

2. (

• ill ,
• inauspicious ,
• ominous

) presaging ill fortune; "ill omens"; "ill predictions"; "my words with inauspicious thunderings shook heaven"- P.B.Shelley; "a dead and ominous silence prevailed"; "a by-election at a time highly unpropitious for the Government" ;