IPA: /ˈɡʌmˌbɔɪl/
KK: /ˈɡʌmˌbɔɪl/
A small swelling or sore on the gum, usually caused by infection or tooth decay.
The dentist treated the gumboil to relieve the pain in my mouth.
Gumboil is formed from "gum" (from Old English "guma", meaning a sticky substance) and "boil" (from Old English "bylgan", meaning to bubble or seethe). The word refers to a painful swelling or abscess in the gums, resembling a boil.
Think of a 'sticky substance' ('gum') that 'bubbles' ('boil') when infected, which helps you remember that a gumboil is a painful swelling in the gums.