誕

It is a phono-semantic compound, consisting of:

言 (“speech, words”) as the semantic element;

延 (“to extend, to prolong”) as the phonetic element.

The character developed two distinct semantic fields:

Birth - “to be born, to give birth,”:

탄생 (誕生) – birth, nativity

성탄 (聖誕) – holy birth, most often Christmas

Falsehood - “to speak falsely,” “to fabricate,” reflecting the idea of words being “extended” beyond truth.

허탄 (虛誕) – absurd, false, groundless

기탄 (忌誕) – reservation, reluctance (lit. avoid + falsehood)

Thus, 誕 combines the sense of coming into being with the figurative sense of words stretched into falsity, making it a character that bridges both creation and deception in meaning.