The word 植入 is a verb-object compound formed by combining the character 植 (zhí), meaning "to plant" or "to implant", with the character 入 (rù), meaning "to enter" or "to insert". Together, they literally describe the action of "implanting something into" a substrate or host. This formation follows a common grammatical structure in Chinese where a verb is directly followed by its object. Over time, the term has evolved from its concrete, biological or agricultural roots (e.g., implanting a seed or a medical device) to acquire a dominant modern, metaphorical meaning, most notably referring to the discreet integration of products, ideas, or information into media content, as in "product placement" (广告植入).