voluntarily
[adverb]
Synonyms: willingly, by choice, freely, off one's own bat, of one's own accord

[TahlilGaran] English Synonym Dictionary ▲

vol‧un‧ta‧ri‧ly AC /ˈvɒləntərəli, ˈvɒləntərɪli, ˌvɒlənˈterəli $ ˌvɑːlənˈterəli/ adverb
[Word Family: verb: volunteer; noun: volunteer; adverb: voluntarily ≠ involuntarily; adjective: voluntary ≠ involuntary]

1. if you do something voluntarily, you do it willingly, without anyone telling you to do it:
She wasn’t fired – she left voluntarily.

2. if you do work voluntarily, you do it because you want to, and are not paid for it ⇒ volunteer:
Susan worked in the studios voluntarily, to gain experience.

[TahlilGaran] Dictionary of Contemporary English ▲