기초가 · 기초를
foundation, basics, groundwork
Example
외국어는 처음에 기초를 잘 배워야 해요.
With a foreign language, you have to learn the basics well at the start.
Word parts
기 base+초 cornerstone
Literally 'base stone' — the stone a pillar stands on.
Good to know
기초 suggests a starting level (기초 한국어 'beginner Korean'); 기본 means the standard essentials.
Related words