Sino-Korean
From Wikipedia, the free encyclopedia.
Hanja were first introduced into the Korean Peninsula during the Chinese Han Dynasty (202 BC–AD 220) — largely through the Cheonjamun (Thousand-Character Classic) — and their introduction into Korea was closely tied to the spread of Buddhism.
Although many of the most frequently used words in Korean are of native Korean origin, Sino-Korean words today make up over 50% of the Korean vocabulary.