大だい事じに至いたる

expression, godan verb (-ru)

develop into a serious incident; become a big deal

Used when a minor problem escalates into a major issue. Often appears in negative contexts (e.g., 大事に至らずに済む).

• 小ちいさなミスが大だい事じに至いたることもある。

  A small mistake can sometimes develop into a serious incident.

• 幸さいわい、事じ故こは大だい事じに至いたらなかった。

  Fortunately, the accident did not become a major incident.