1. Having an allergy or peculiar or excessive susceptibility (especially to a specific factor)
   - allergic, hypersensitive, hypersensitized, hypersensitised [Brit], sensitized, sensitised [Brit], supersensitized, supersensitised

See also: susceptible

• quick-witted
• quick-wittedness
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• quickening
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• quicklime
• quickly
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• quicksand
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• quiddity
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• quids in
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• quiescent