sicken

Short definition from Wiktionary

Verb

1. 1
   To make ill.
2. 2
   To become ill.
3. 3
   To fill with disgust or abhorrence.
4. 4
   To lower the standing of.
5. 5
   To be filled with disgust or abhorrence.
6. 6
   To become disgusting or tedious.
7. 7
   To become weak; to decay; to languish.