What are the opposite words for auxiliary?

The antonyms for the word "auxiliary" are primary, central, main, and principal. Auxiliary means something that provides additional support or serves as a backup, while the antonyms suggest a focus on the main or primary role. For example, a primary source of power would be the opposite of an auxiliary power source. Similarly, central or principal functions are the opposite of auxiliary functions that support the main tasks. Using the right antonym for auxiliary helps to provide clarity in communication and avoid confusion. Knowing the antonyms for a word can also help to enhance vocabulary and improve writing skills.

Antonym of the day

split down the middle
combine, join.