Noun
-
a pernicious and malign influence that is hard to get rid of
"racism is a pestilence at the heart of the nation"
"according to him, I was the canker in their midst"
-
an ulceration (especially of the lips or lining of the mouth)
- canker sore -
a fungal disease of woody plants that causes localized damage to the bark
Verb
-
infect with a canker
-
become infected with a canker