to the coreCOMPLETELYextremely or completely 十分地；彻底地shaken/shocked/thrilled to the core When I heard the news, I was shaken to the core. 我听到这消息十分震惊。
That woman is rotten to the core! 那个女人坏透了！
He was a bureaucrat to the core. 他是个十足的官僚。
rotten to the core• The financial system is rotten to the core.• Her very moral fiber was rotten to the core.
→ to the core at core1(1)