voluntarily
🇺🇸
/ˌvɑːlənˈterəli/
🇬🇧
/ˈvɒləntrəli/
doing something because you want to, not because you have to
He voluntarily helped clean the park without anyone asking him.
他自願幫忙打掃公園,沒有人要求他這樣做。
doing something without getting paid
She voluntarily works at the animal shelter without receiving any money.
她自願在動物收容所工作,不收取任何報酬。