volatile -
An unstable situation that is likely to get worse quickly
Victor realized that he had created a volatile chemical that could easily explode if he wasn't very careful
noun
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inferno -
A large fire that is dangerously out of control
The raging inferno that was consuming the forest would be a big challenge for the firefighters.
verb
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lurk -
(of a person or animal) be or remain hidden so as to wait in ambush for someone or something
Artie lurked under his sister's bed so he could jump out and scare her when she least expected it.
adjective
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addictive -
The habit-forming quality of a substance or activity that causes someone to become dependent on using it or doing it.
Nicotine is a highly addictive substance found in cigarettes.
adjective
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ominous -
Giving the impression that something bad, unpleasant or threatening is going to happen.
The dark clouds overhead were an ominous sign that a storm was coming.
adjective
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obese -
Extremely fat in a way that is dangerous for health
The WHO says that obesity has reached epidemic proportions globally, with at least 2.8 million people dying each year as a result of being overweight or obese.
noun
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peril -
Serious and immediate danger
Roger was aware of the peril of shark-infested waters, but he truly realized it when it was too late.
noun
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nosedive -
A sudden, steep drop, a sharp decline in condition, success, or stability.
After the scandal, the company’s stock took a nosedive.
adjective
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treacherous -
Hazardous or extremely dangerous conditions.
The already dangerous road on the narrow mountain pass was made even more treacherous by the high incidences of rock falls.
nounverb verb
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crack -
To break or cause to break without complete separation of parts, often with a sharp sound.
She cracked the mug when she accidentally dropped it.
noun
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tinderbox -
A volatile or tense environment, emotionally or politically charged, likely to erupt in violence or conflict.
During the blackout, the police were concerned about looting, and the downtown felt like a tinderbox ready to explode.
noun
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heresy -
An opinion or belief that contradicts established norms or accepted standards.
Galileo was once accused of heresy for claiming the Earth orbits the sun.