Adjective change

Positive
brimstone

Comparative
none

Superlative
none

  1. If something or someone is brimstone, they are made up of or they look like brimstone; about or related to Hell.

Noun change

Singular
brimstone

Plural
brimstones

  1. (countable & uncountable) Brimstone is sulphur.
  2. (countable & uncountable) Brimstone is the sulphur of Hell.

Usage notes change

This word is usually used in relation to the Bible or other such things.