根底 (kontei)

彼は英文学界の大御所である. He's a leading figure in the domain of English literature.その発明は科学界を根底から揺さぶった. The invention rocked [shook] the world of science to its foundation.彼は学界から身を転じてジャーナリストになった. He left the academic world and turned journalist [switched to journalism].彼は医学界に不滅の金字塔をうち建てた. He accomplished a monumental work in the field of medicine.氏は学界のために大いに功労があった. He has done a great deal for [rendered great services to] the cause of learning [science].彼は医学界に多大な影響力を持っている。

He has great influence over the medical world.