invariable

nouns

a quantity that does not vary
constant, constant quantity, invariable

adjectives

not liable to or capable of change
"an invariable temperature"; "an invariable rule"; "his invariable courtesy"
invariable
is derived from
invariableness
is derived from
invariability
is derived from
invariability
antonym
variable
is similar to
unvarying in nature
"maintained a constant temperature"; "principles of unvarying validity"
changeless, constant, invariant, unvarying
is similar to
(of rules) stringently enforced
"hard-and-fast rules"
hard-and-fast, strict
is similar to
unaffected by a designated operation or transformation
invariant
see also
(sometimes followed by `with') in agreement or consistent or reliable
"testimony consistent with the known facts"; "I have decided that the course of conduct which I am following is consistent with my sense of responsibility as president in time of war"- FDR
consistent
see also
steadfast in purpose or devotion or affection
"a man constant in adherence to his ideals"; "a constant lover"; "constant as the northern star"
constant