鉄てっ則そくてっそくFreq.FrequencyTop 50,000じ字FuriganaMeanings1nounironclad rule; inviolable rule; iron lawA firm, unbreakable rule or principle that must be followed without exception. Often used in formal or serious contexts.安あん全ぜん確かく認にんは工こう事じ現げん場ばの鉄てっ則そくだ。Safety checks are an ironclad rule at construction sites.
