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auxiliary

aux·il·ia·ry

auxiliary

 
pronunciation:
awg zIl y ri [or] awg zI l ri
parts of speech:
adjective, noun
part of speech: adjective
definition: serving as an extra means of support; additional.
The hospital has an auxiliary power generator.
synonyms:
additional
similar words:
extra
 
part of speech: noun
inflections: auxiliaries
definition 1: a person or thing that helps, assists, or supports.
The fire department auxiliary helps out at large building fires.
synonyms:
aide, assistant
definition 2: see auxiliary verb.