Entry Word: auxiliary

Function: adjective

Meaning: available to supply something extra when needed <the auditorium has an auxiliary cooling system used only on particularly sweltering days>

Synonyms accessory, peripheral, supplemental, supplementary

Related Words backup, makeshift, substitute; added, additional, another, further; complementary, contributory; assistant, assisting, helping, supportive, tributary; secondary, subordinate, subservient, subsidiary; dispensable, excess, nonessential, superfluous, surplus, unessential

Near Antonyms basic, fundamental, primary, prime; all-important, essential, imperative, indispensable, integral, necessary, needed, needful, required, requisite, vital

Antonyms chief, main, principal