입

Noun

 * 1)  mouth
 * 2) lips
 * 3)  a man's word
 * 4)  the number of people who eat food

Synonyms

 * : mouth, entrance
 * : wide mouth (of bowls, etc.; vulgar for men)
 * : narrow mouth (of bottles, animals, etc.; vulgar for men)

Counter

 * 1) a unit that counts the amount of food that can be eaten at a time.

Etymology 2
Korean reading of various Chinese characters.

Etymology 3
South Korean reading of various Chinese characters, originally.

Usage notes
In South Korea, the original Sino-Korean reading is used if the hanja is not part of the first syllable of a Sino-Korean compound word. The change in reading from to  is known as.