noun
A feeling of apprehension, doubt, fear etc.
A sudden sickly feeling; queasiness.
(now chiefly in the negative) A prick of the conscience; a moral scruple, a pang of guilt.
(archaic, UK, dialectal) Mortality; plague; pestilence.
(archaic, UK, dialectal) A calamity or disaster.
verb
(intransitive) To have a sickly feeling.