From Wiktionary, the free dictionary
ᄉᆡᆷ〯 (sǒym)
- spring (source of water)
1447, “Stanza 2”, in 龍飛御天歌 / 용비어천가 [Yongbi Eocheon'ga]:ᄉᆡ〯미〮 기픈〮 므〮른〮 ᄀᆞ〮ᄆᆞ래〮 아니〮 그츨〮ᄊᆡ〮 내〯히〮 이러〮 바ᄅᆞ〮래〮 가〮ᄂᆞ니〮- sǒy-mí kìphún mú-lún kómò-láy àní kùchúlssóy nǎy-hí ìlé pàló-láy kánòní
- The water from a deep spring, for a drought dries it not, becomes a stream and flows into the sea.