Part of speech: adjective
Origin: Latin, 15th century
(of a noun in an inflected language) having the same form in both the singular and the plural, e.g., sheep.
Examples of Invariable in a sentence
" 'The invariable mark of wisdom is to see the miraculous in the common.' ― Emerson"
"My mother's kitchen includes the invariable combination of a pot of coffee and plate of cookies."
Invariable can be broken down into its Latin parts for an easy definition. "In" means not and "variabilis" means changeable. If you're invariable you've made up your mind and there's no changing it.
Did you Know?
You might not be familiar with the linguistic meaning of invariable: a noun with the same form in the singular and plural. You find these nouns most commonly in the animal world: sheep, buffalo, deer, fish, moose, etc.