The idiom **全神贯注 (quán shén guàn zhù)** is formed through a parallel and metaphorical structure: **全神** ("whole spirit" or "complete attention") is coupled with **贯注** ("to pour into"), creating a vivid image of one's entire mind and concentration being "completely poured into" a single object or task. Grammatically, it follows a common Chinese idiom pattern where "全神" (noun phrase) is the subject acted upon by the verb phrase "贯注," resulting in a meaning equivalent to "to be wholly absorbed" or "to concentrate fully." This formation efficiently conveys a state of intense, undivided focus through a tangible metaphor of fluid totality.