adjective

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Good / Strong

ironclad - So strong that it cannot be challenged or changed

When World War II started, Fred's ironclad loyalty to his country caused him to enlist in the army immediately.

noun

See verb

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Other / Fast

jolt - An abrupt rough or violent movement

Ewan woke up with a jolt, realizing that he had slept through the alarm and was going to be over an hour late for his first day of work at the new job.

verb

See noun

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Bad / Hurt

jab - Poke (someone or something) roughly or quickly, especially with something sharp or pointed

The thought of getting jabbed by a needle is a common fear for many people.

adjective

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Bad / Uncomfortable

Url

jarring - Causing a sudden, unpleasant, or shocking effect.

The loud and sudden fire alarm was jarring in the otherwise quiet neighborhood.

noun

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Good / Big

Url

jackpot - A large cash prize, typically won in a game of chance or lottery.

He won the jackpot in the lottery and became a millionaire overnight.

adjective

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Other / Shape

jagged - Having rough, sharp points protruding

The broken drinking glasses were no longer usable because the jagged edges could injure someone.

noun

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Bad / Strange

jargon - Special words or expressions that are used by a particular profession or group and are difficult for others to understand

At his first day on the job, Louie kept getting confused by all of the technical jargon that his boss insisted on using.

adjective

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Good / Pleasure

Url

irresistible - Too attractive, appealing, or tempting to be refused or ignored.

The smell of freshly baked cookies was simply irresistible, making everyone want a bite.

noun

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Bad / Stupid

lackey - A servant, especially a liveried footman or manservant

The king would assign small tasks to his lackey because others considered such work to be beneath him, and he knew it wouldn't look right if he did such things himself.

noun

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Bad / Stupid

Url

knucklehead - A foolish or unintelligent person; someone who makes silly mistakes.

When he forgot his keys on the kitchen table for the third time this week, he felt like such a knucklehead!

verb

See noun

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Other / Fast

jolt - To cause (something or someone) to move in a quick and sudden way

Emma jolted awake when she heard footsteps downstairs.

verb

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Bad / Dangerous

Url

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.