Third-person singular simple present indicative form of canker

plural of canker

Infected with canker; ulcerous. / Causing canker; ulcerating.

present participle of canker

Infected with a canker or having a cankerous part / Ulcerated / (figuratively) Corrupted; morally corrupt / (figuratively) bad-tempered

simple past tense and past participle of canker

(phytopathology) A plant disease marked by gradual decay. / A region of dead plant tissue caused by such a disease. / A worm or grub that destroys plant buds or leaves; cankerworm.

(transitive) To affect as a canker; to eat away; to corrode; to consume. / (transitive) To infect or pollute; to corrupt. / (intransitive) To waste away, grow rusty, or be oxidized, as a mineral.

plural of black canker

An ulcer in the mouth, called an aphthous ulcer, caused by a break in the mucous membrane.