also: かくかい
noun
various fields; all walks of life; each sector
Refers collectively to different areas of society, professions, or industries. Often used in news or formal contexts to indicate broad representation or opinion.
各界の専門家が会議に参加した。
Experts from various fields participated in the conference.
この問題について各界から意見を募
We solicited opinions from all walks of life on this issue.
Compound of 各 (each, every) and 界 (world, circle, field). The reading かっかい is a result of gemination (促音便) from かくかい.