adjunct - noun

something added to another thing but not an essential part of it

a person who is an assistant or subordinate to another

a construction that can be used to extend the meaning of a word or phrase but is not one of the main constituents of a sentence

adjunct - adjective

• furnishing added support
• of or relating to a person who is subordinate to another

adjunct - thesaurus

accessory   adjuvant   ancillary   appurtenant   assistant   auxiliary