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

See also: susceptible

• unstructured
• unstrung
• unstuck
• unstudied
• unstudious
• unstuff
• unstylish
• unsuasible
• unsubdivided
• unsubduable
• unsubdued
• unsubmissive
• unsubscribe
• unsubstantial
• unsubstantialise
• unsubstantialize
• unsubstantiated
• unsubtle
• unsuccessful
• unsuccessful person
• unsuccessfully
• unsufferable
• unsugared
• unsuitability
• unsuitable