auxiliary

 
Pronunciation: /ɔːgˈzɪlɪəri, ɒg-/

adjective

  • providing supplementary or additional help and support: auxiliary airport staff the ship has an auxiliary power source
  • (of troops) engaged in the service of a nation at war but not part of the regular army.
  • (of a sailing vessel) equipped with a supplementary engine: an auxiliary schooner

noun (plural auxiliaries)

  • an auxiliary person or thing: a nursing auxiliary there are two main fuel tanks and two auxiliaries
  • North American a group of volunteers giving supplementary support to an organization or institution: members of the Volunteer Fire Department’s women’s auxiliary
  • Grammar an auxiliary verb.
  • a naval vessel with a supporting role, not armed for combat.

Origin:

late Middle English: from Latin auxiliarius, from auxilium 'help'

Spelling help

There is only one l in auxiliary.