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adjective
ominous - Giving the impression that something bad, unpleasant or threatening is going to happen.
fatal - Something that can cause death.
verb
jeopardize - To subject somebody or something to the risk of loss, harm, danger or failure.
noun
tempest - A violent windy storm
Picture
Abyss - A deep or seemingly bottomless hole or chasm.
precarious - Not safe and likely to fall or fail
nounverb noun
doom - Death, destruction, or some other terrible fate
Breach - An act of breaking a law, rule, or agreement.
lurk - (of a person or animal) be or remain hidden so as to wait in ambush for someone or something
Beast - Something or somebody very difficult or unpleasant to deal with.
nounverb verb
Crack - To break or cause to break without complete separation of parts, often with a sharp sound.
inferno - A large fire that is dangerously out of control