Homonym: 이 (Tooth)
"이" is a Korean particle used to indicate the subject of a sentence when the preceding noun ends in a consonant. It helps clarify who or what is performing the action in a sentence. For example, in the phrase "사람이" (the person), "이" shows that the person is the subject.
When the noun ends in a vowel, the particle "가" is used instead. Both "이" and "가" serve similar functions but are chosen based on the final sound of the noun. Understanding these particles is essential for constructing grammatically correct sentences in the Korean language.