Definitions
1.VerbTo make ill."The infection will sicken him until amputation is needed."
2.VerbTo become ill."I will sicken if I don’t get some more exercise."
3.VerbTo fill with disgust or abhorrence."His arrogant behaviour sickens me."
4.VerbTo lower the standing of.
5.VerbTo be filled with disgust or abhorrence.
6.VerbTo become disgusting or tedious.
7.VerbTo become weak; to decay; to languish.