The Chinese word **胎记 (tāijì)**, meaning "birthmark," is a compound noun formed through semantic combination. The first character, **胎 (tāi)**, means "fetus" or "womb," indicating the origin, while the second character, **记 (jì)**, means "mark" or "record." Together, they create a literal and logical meaning of a "fetal mark" or a "mark from the womb," directly describing a distinctive skin blemish present from birth. This formation exemplifies a common pattern in Chinese where two meaningful characters are combined to precisely denote a specific concept.