Englishfor English speakers
intense
Adjective
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Something that is intense has a very strong action or effect.
The intense heat of the day has gone, and a cooler evening is here.
The pain in his head was so intense he could hardly stand up.
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Intense activity involves doing a lot in a short time.
The practice involved a mixture of long, slow stretching and intense jumping and running.
activity
Noun
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When a person or animal has activity, it is active or lively.
The sleeping dog did not show much activity.
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When you have a function to do, you have an activity.
The child has many after-school activities.
She participates in women's rights activities.