invariable

Use the adjective invariable to describe something that's unlikely to change, such as your invariable custom of eating deep-dish pizza every Saturday.

You can hear the word vary in invariable. Something that varies changes or is made up of different kinds of things. When you add the prefix in-, meaning "not," and the adjective suffix -able, you get an adjective to describe something that's not able to vary or change. Synonyms for invariable include constant, fixed, and immutable. Someone who's invariable in her habits may seem predictable and boring on the one hand, and steady and reliable on the other.

DEFINITIONS OF: invariable

1

adj not liable to or capable of change

“an invariable temperature”
“an invariable rule”
“his invariable courtesy”
Synonyms
consistent
(sometimes followed by `with') in agreement or consistent or reliable
constant
steadfast in purpose or devotion or affection
changeless, constant, invariant, unvarying
unvarying in nature
hard-and-fast, strict
(of rules) stringently enforced
invariant
unaffected by a designated operation or transformation
Antonyms:
variable
liable to or capable of change
inconsistent
displaying a lack of consistency
inconstant
likely to change frequently often without apparent or cogent reason; variable
changeable, uncertain, unsettled
subject to change
covariant
changing so that interrelations with another variable quantity or set of quantities remain unchanged
multivariate
pertaining to any procedure involving two or more variables
protean
taking on different forms
shifting
continuously varying
variant
exhibiting variation and change
versatile
changeable or inconstant
show more antonyms...

n a quantity that does not vary

Synonyms:
constant, constant quantity
Types:
parameter, parametric quantity
a constant in the equation of a curve that can be varied to yield a family of similar curves
degree of freedom
one of the minimum number of parameters needed to describe the state of a physical system
Type of:
quantity
the concept that something has a magnitude and can be represented in mathematical expressions by a constant or a variable
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