As you are well aware by now, there are two kinds of numbers in Korean: Korean native numbers and Sino-Korean numbers. As you might have guessed, the latter, Sino-Korean numbers, can be represented by Hanja. The Hanja 九 [구] is the character for the number nine, the equivalent of the native Korean number 아홉.
Among all Hanja, the characters of the Sino-Korean numbers are perhaps the ones you will see most often (at markets for example). Truly all Koreans can read these Hanja, so it is in the best interest for those planning to stay a long time in Korea to get familiar with these Hanja. The Hanja 九 [구] represents the number nine and is the equivalent of the native Korean number 아홉.
九 [구] Vocabulary
Unlike most Hanja for which I advise against memorizing the characters themselves, I advise the opposite for the Sino-Korean number characters. These characters tend to appear in newspapers, news articles and sometimes in markets. They are handy as they can represent numbers in a shorter form than writing the numbers themselves. However, as always with Hanja, in the end, the vocabulary associated with the Hanja is still more important. The Sino-Korean numbers have a few practical words associated with them, though.
|Hanja / 한자||Hangeul / 한글||English / 영어|
|九日||구일||The ninth day of the month; Nine days|
|十九日||십구일||The nineteenth day of the month; Nineteen days|
|二十九日||이십구일||The twenty-ninth day of the month; Twenty-nine days|