auxiliary
/ˌɒksiˈlɪri/ (OK-see-lee-ree)
Definitions
1. noun
something or someone that provides additional support, resources, or help
“The emergency services were supported by an auxiliary team from a neighboring city.”
2. adjective
relating to or providing additional support, resources, or help
“The auxiliary power unit can supply power when the main engines fail.”
3. verb
to provide or supply additional support, resources, or help
“The company will auxiliary the team with more resources to meet the deadline.”