voluntary
definition: of your own free will or design
example:
speech part: adjective
synonyms:
definition: controlled by individual volition
example: voluntary motions
speech part: adjective
synonyms:
definition: composition (often improvised) for a solo instrument (especially solo organ) and not a regular part of a religious service or musical performance
example:
speech part: noun
synonyms:
definition: (military) a person who freely enlists for service
example:
speech part: noun
synonyms:
volunteer
military volunteer