Smallpox was a very dangerous malady that has mostly been cured with vaccinations.
verb
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erupt -
To explode suddenly after forces can't be held back any longer
After rumbling for a week, the volcano erupted spewing forth rivers of lava
verb
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unleash -
To release something powerful or intense, especially something that has been held back; to set free or allow something to happen without restriction.
The storm unleashed heavy rains and strong winds across the region.
adjective
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malignant -
Dangerous and harmful, tending to produce death or deterioration – often describing something destructive or uncontrollably harmful.
The doctors were concerned the tumor might be malignant and might spread quickly, so they removed it.
noun
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deluge -
A severe flood or overwhelming rush of water.
The heavy rain turned into a deluge, submerging cars and streets
verb
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burst -
To suddenly break apart, spilling its contents, usually as a result of internal pressure.
The old rusted water main under the street burst, causing the road above to flood.
verb
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loom -
To appear as a dangerous event that might happen in the near future
Joe looked at the economic data, and could sense a recession looming in the near future.
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.
verb
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jeopardize -
To endanger or threaten the success or safety of something.
Drinking and driving can jeopardize not only your own life but also the lives of others.
adjective
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flammable -
Easily set on fire; capable of catching fire quickly.
Keep flammable materials away from open flames or heat sources.
verb
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doom -
Condemn to certain destruction or death
Devon's father told him that unless he improved his grades, he was doomed to a lifetime of poorly paid jobs.
adjective
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pernicious -
Having a harmful effect, especially in a gradual or subtle way.
People used to think that smoking was good for you because it seemed calming, but now we realize that its pernicious effects are deadly over time.
