Cankered imp. & p. p. : of Canker

Cankered a. : Affected with canker; as, a cankered mouth.

Cankered a. : Affected mentally or morally as with canker; sore, envenomed; malignant; fretful; ill-natured.

Example:
What is a canker sore and how do you alleviate the pain?

Taxonomy
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Defination from the web:
Cankered in the Online Dictionary. Meaning of Cankered. Pronunciation of Cankered. Translations of Cankered. Cankered synonyms, Cankered antonyms. ... Save it were the cankered wrath of an old witch like Mistress Hibbins," added he, attempting to smile, "I know nothing ...