gumboil
/ˈɡʌmˌbɔɪl/
noun
- A small, painful swelling or abscess on the gum, usually caused by an infection at the root of a tooth.
- A gumboil can make it hard to chew on that side of your mouth.
- The dentist said the gumboil was caused by an untreated cavity.
- She rinsed her mouth with salt water to soothe the gumboil.