Definitions

1. noun

A type of plant, particularly a type of weed with toxic properties, especially the Cynoglossum officinale, which is often used as an example of a noxious weed.

“The farmer struggled to eradicate the cankerroot from his fields, as it seemed to grow back no matter what he did.”

2. noun

A metaphorical or figurative term for a problem or issue that is persistent and difficult to resolve.

“Her cankerroot was her fear of public speaking, which made her nervous and anxious every time she had to give a presentation.”