adj. Function: adjective
Synonyms: ESSENTIAL 4, imperative, necessary, necessitous, prerequisite
Related Words: cardinal, fundamental
Antonyms: dispensable
adj. Function: adjective
Synonyms: ESSENTIAL 4, imperative, necessary, necessitous, prerequisite
Related Words: cardinal, fundamental
Antonyms: dispensable
Merriam Webster. Collegiate thesaurus English dictionary. Английский энциклопедический толковый словарь тезауруса. 2012