noun
a specialized medical care unit for patients who require close monitoring and intensive treatment
adjective
describing the level of care provided in the unit, which is intensive
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The patient was transferred to the intensive care unit for closer monitoring.
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They moved him to the ICU for more careful watching.
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They put her in the intensive care ward to keep an eye on her.
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His car was in such bad shape, it needed intensive care at the mechanic's.