This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. having an allergy or peculiar or excessive susceptibility (especially to a specific factor)

"The sinister aspect of the place had its effect on Lenox, hypersensitised as he was by anxiety over lost hours, and by the premonitory chill of fever, strengthening that prescience of disaster which saps spirit and courage more surely than disaster itself."

susceptible   

hypersensitive