Word: 自愿 (zìyuàn) Traditional: 自願 自愿 dictionary entry zìyuàn voluntary Full dictionary entry for 自愿 Example sentences using 自愿 2 sentences, showing page 1 of 1. 参加活动完全是自愿的。 Cānjiā huódòng wánquán shì zìyuàn de. Taking part in the activity is entirely voluntary. 我自愿加入中国共产党。 Wǒ zìyuàn jiārù Zhōngguó Gòngchǎndǎng. I willingly join the Chinese Communist Party.