#1 sicken v. [disgust, revolt, nauseate, churn up] cause aversion in; offend the moral sense of; "The pornographic pictures sickened us". wn
#2 sicken v. [come down] get sick; "She fell sick last Friday, and now she is in the hospital". wn
#3 sicken v. [nauseate, turn one's stomach] upset and make nauseated; "The smell of the food turned the pregnant woman's stomach"; "The mold on the food sickened the diners". wn
#4 sicken v. make sick or ill; "This kind of food sickens me". wn
vizzz