late 14c., from Latin voluntarius "willing, of one's free will," from voluntas "will," from the ancient accusative singular present participle of velle "to wish" (see will (v.)). Originally of feelings, later also of actions (mid-15c.). Related: Voluntarily.
例文
1. An e-mail is already circulating amongst news staff calling for voluntary redundance.
新聞部社員の間ですでに電子メールを転送しており、自発的に淘汰するよう呼びかけている。
2.Because the work was voluntary it was flexible,time-wise.
この仕事は任意なので、時間的には柔軟です。
3.He is still involved in voluntary work promoting local enterprise.
彼はまだ地元の起業を促進するボランティアに従事している。
4.Attention is drawn to a special voluntary course in Commercial French.
特別なビジネスフランス語選択科目が注目を集めている。
5.Some local authorities and voluntary organizations also run workshops for disabled people.