大だい手しゅ術じゅつ

noun

major surgery; major operation

Refers to a serious, large-scale surgical procedure, often contrasted with minor or outpatient surgery.

• 彼かれは心しん臓ぞうの大だい手しゅ術じゅつを受うけた。

  He underwent major heart surgery.

• 大だい手しゅ術じゅつの後あとは、長ながいリハビリが必ひつ要ようだ。

  After a major operation, a long rehabilitation is necessary.