na-adjective, noun
accident-free; without accident
Describes a state or record of having no accidents, especially in traffic, workplace, or event safety contexts. Often used in phrases like 無事故で終わる (to end without accident) or 無事故記録 (accident-free record).
今年の花火大会は無事故で終わりました。
This year's fireworks festival ended without any accidents.
彼は無事故記録を10年続けている。
He has maintained an accident-free record for 10 years.