しぎょう
start of work; commencement; opening
Common word
Noun, Suru verb, Intransitive
教室きょうしつに入はいって席せきに着つくのとほぼ同時どうじに、始業しぎょうを知しらせるチャイムの音おとが鳴なり響ひびく。
About the same time as he entered the classroom and arrived at his seat, the chime to announce class rings across the school.