기독교가 · 기독교를
Christianity; Protestantism
Example
한국에는 기독교를 믿는 사람이 꽤 많아요.
There are quite a lot of people in Korea who believe in Christianity.
Word parts
기독 is a sound transliteration of 'Christ', via Chinese; the syllables carry no real meaning.
Good to know
In everyday Korean, 기독교 usually means Protestant Christianity; Catholicism is called 천주교.
Related words