unpromptedly

not-comparable

Without being prompted; of one's own volition, or by one's own initiative.

Japanese Meaning

促されずに / 自発的に / 自らの意思で

She unpromptedly offered to organize the meeting notes, saving everyone time.

彼女は頼まれていないのに会議の議事録をまとめることを申し出て、皆の時間を節約した。

Sense（1）

Without being prompted; of one's own volition, or by one's own initiative.