adjective
Synonyms: inflexible 3, constant, fixed, immovable, immutable, inalterable, invariable, unchangeable, unmodifiable, unmovable
Antonyms: alterable
adjective
Synonyms: inflexible 3, constant, fixed, immovable, immutable, inalterable, invariable, unchangeable, unmodifiable, unmovable
Antonyms: alterable
Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003