groundbreaking
意味
- 建設起工
例文
It was a groundbreaking invention at the time.
当時としちゃ画期的な発明だったね。
語源
英語の原文（Wiktionary）
From ground + breaking, in reference to the practice of breaking ground at the beginning of a new building or construction.
It was a groundbreaking invention at the time.
当時としちゃ画期的な発明だったね。
From ground + breaking, in reference to the practice of breaking ground at the beginning of a new building or construction.