始業|しぎょうshigyou[0]heiban (flat)

1. noun, suru verb, intransitive verbstart of work; commencement; opening
   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り響なりひびく。↗

   About the same time as he entered the classroom and arrived at his seat, the chime to announce class rings across the school.

• SynonymスタートNeutralA loanword for starting or setting off, used widely from races to projects; it is not specific to work, whereas 「始業」 names the start of the workday or school term.
• Synonym始めるはじめるNeutralThe everyday verb for starting anything, the most common of all; it does not specifically mean starting work, so 「始業」 is the word for the workday or term.
• Synonym着手ちゃくしゅWrittenWritten/formal prose for setting to work on a project, stressing formal commencement of implementation; 「始業」 is the daily start of work or school.
• Related開始かいしNeutralA neutral word for a start, formal yet usable almost anywhere; unlike 「始業」, it covers any kind of beginning, not just the start of the workday or school term.
• Related乗り出すのりだすNeutralA verb for setting out on something new, stressing eager involvement, as in 「調査に乗り出す」; 「始業」 simply marks the start of work or classes.
• Related踏み出すふみだすNeutralA verb for stepping forward or taking the first step, stressing a brave start on a new stage; 「始業」 is the fixed term for the start of work or school.
• Related発足ほっそくWrittenWritten/formal prose for an organization officially starting up, as in 「新内閣が発足」; it applies to bodies and movements, not to the daily start of work.
• Related創始そうしWrittenWritten/formal prose for founding or originating something new, stressing pioneering a system or practice; 「始業」 just marks the start of work or classes.
• Related始動しどうNeutralStarting a machine or launching a project, stressing that something begins running, as in 「エンジン始動」; 「始業」 covers the start of the workday or term.
• Related仕掛けるしかけるNeutralTo set something in motion, stressing laying traps or provoking a fight; quite different from 「始業」, which neutrally marks the start of work or classes.
• Related取り掛かるとりかかるNeutralA verb for getting down to the task at hand, stressing starting to tackle the work; 「始業」 marks the beginning of the day's work or the term's classes.
• Relatedし始めるしはじめるNeutral「する」 plus 「始める」: to begin doing something, as in 「仕事をし始める」; 「始業」 refers only to the start of work or the opening of school.
• RelatedしだすNeutralA colloquial verb for starting to do something; it can also mean making food for delivery to customers. 「始業」 is the formal term for the start of work or school.
• RelatedやりだすCasualA colloquial verb for getting going on something, often with a sense of suddenly diving in; 「始業」 is the set term for starting work or school.
• RelatedおっぱじめるCasualVulgar colloquial for suddenly starting something, rough in tone but not necessarily disapproving; 「始業」 is the formal word for starting work or school.
• Relatedやり始めるやりはじめるNeutralA somewhat colloquial verb for starting to do something, usable for all sorts of actions; 「始業」 is reserved for the start of work or the school term.
• Antonym終業しゅうぎょうWrittenThe antonym: the end of the workday or school term, as in 「終業式」, standing opposite 「始業」's start of work or classes.
• Antonym閉業へいぎょうWrittenClosing down or shutting up shop, the opposite of opening for business; it concerns a business ending operations, not the daily start marked by 「始業」.

Use 「始業」 for the start of each day's work or of a school term, as in 「始業時間」「始業式」「始業点検」. For starting in general say 「開始」 or 「始める」; for getting to work on a task, 「着手」 or 「取り掛かる」; for an organization's launch, 「発足」. The opposite is 「終業」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. その日ひの仕事しごとを始はじめること。
2. 学期がっきまたは学年がくねんの授業じゅぎょうを始はじめること。