voluntary
US
UK voluntary adj: (under one's own control)
SC 自愿的 zì yuàn de
TC 自願的
TC 自願的
SC 自告奋勇的 zì yuàn de ，zì gào fèn yǒng de
Donations are voluntary and very much appreciated.
voluntary adj: (work, organisation: charitable)
SC 志愿性质的 zhì yuàn xìng zhì de
SC 义务性质的 zhì yuàn xìng zhì de ，yì wù xìng zhì de
A lot of senior citizens enjoy doing voluntary work.
voluntary adj: (law: done intentionally)
SC 故意的 gù yì de
SC 蓄意的 gù yì de ，xù yì de
She's facing a charge of voluntary manslaughter.
VAD n: historical, abbreviation (first-aid organization)
SC 志愿救护支队
voluntary association n: (not-for-profit organization)
SC 志愿团体 zhì yuàn tuán tǐ
TC 志願團體
TC 志願團體
SC 志愿协会 zhì yuàn tuán tǐ，zhì yuàn xié huì
voluntary work n: (unpaid employment for a cause)
SC 志愿工作
voluntary worker n: (unpaid employee)
SC 志愿工作者，义工 yì gōng