The shovel was a ground-breaking invention.

Behind the Groan

An Invention That Breaks Ground

A groundbreaking invention is unusually innovative or important. A shovel also breaks the ground in the most literal way whenever it digs into soil. The sentence sounds like a serious bit of praise until the tool turns the familiar adjective into a job description. Give the line like a confident historical fact and keep the hyphenated phrase smooth. No dramatic pause is needed; the compact wording works when listeners realize the compliment was physically accurate all along.