Meaning

• To make ill.

  "The infection will sicken him until amputation is needed."

• To become ill.

  "I will sicken if I don’t get some more exercise."

• To fill with disgust or abhorrence.

  "His arrogant behaviour sickens me."

• To lower the standing of.

• To be filled with disgust or abhorrence.

• To become disgusting or tedious.

• To become weak; to decay; to languish.