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allergy

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allergy
allergy /ˈælədʒi $ -ər-/ noun (plural allergies) [uncountable and countable]
 Date: 1900-2000
 Language: German
 Origin: allergie, from all- 'all' + Greek ergon 'work'
a medical condition in which you become ill or in which your skin becomes red and painful because you have eaten or touched a particular substance
    allergy to
    I have an allergy to cats.
    a food allergy