noun
an inflammation of the tonsils, especially a chronic condition typically caused by bacterial or viral infection
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The patient was diagnosed with acute tonsillitis and prescribed antibiotics.
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My sister is feeling really sick with tonsillitis and can't eat anything.
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I heard that tonsillitis is going around the school, so wash your hands often.
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Dealing with tonsillitis feels like having a constant sore throat and fatigue.