The Chinese word "源于" is a verb meaning "to originate from" or "to stem from," and it is formed through a standard grammatical construction in Classical Chinese that remains productive in modern usage. It combines the noun "源" (*yuán*), meaning "source" or "origin," with the preposition "于" (*yú*), meaning "from," "in," or "at." When joined, "于" attaches to the noun to create a verb phrase that literally expresses "to have one's source in." This structure, where "于" follows a noun to indicate location or point of derivation, is a common way to form descriptive verbs, as seen in the example "黄河源于青海" (*Huáng Hé yuán yú Qīnghǎi*), meaning "The Yellow River originates from Qinghai."