auxiliary

/ɔːɡˈzɪliəri/
noun
  1. A person or thing that provides extra help or support.
    • The teacher's assistant worked as an auxiliary in the classroom.
    • During the emergency, volunteers served as auxiliaries to the fire department.
    • The robot is designed as an auxiliary to help with household chores.
  2. A group of people who support a larger organization, such as a military or church group.
    • The women's auxiliary raised money for the local library.
    • The church auxiliary organized the community food drive.
    • The naval auxiliary provided supplies to the main fleet.
Synonyms
adjective
  1. Providing extra help or support; backup.
    • The hospital brought in auxiliary nurses during the flu outbreak.
    • We have an auxiliary generator in case the power goes out.
    • The auxiliary police force helps with traffic control during parades.
  2. Relating to a verb that helps form tenses, moods, or voices (e.g., 'be', 'have', 'do', 'will').
    • Auxiliary verbs like 'can' and 'must' express ability or necessity.
    • Learners often confuse auxiliary verbs with main verbs.
    • In the sentence 'She is running,' the word 'is' is an auxiliary verb.
Antonyms
What does "auxiliary" mean? | whatsthatwordmean | whatsthatwordmean