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 blac

धमकी भरा

Unclean matter could get absorbed by the injection fluid, enter the body and even cause life - threatening complications.