Simple past tense and past participle of sicken.(verb)
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Use "sickened" in a sentence
"PORT-AU-PRINCE, HAITI -- A cholera outbreak that already has left 250 people dead and more than 3,000 sickened is at the doorstep of an enormous potential breeding ground: the squalid camps in Port-au-Prince where 1.3 million earthquake survivors live."
"Mr Sphinx and I emerged slightly sickened from the cinema."
"At first the word sickened him; then he grappled with it."