‘睁开’ is a compound verb meaning 'to open (one’s eyes)'. It combines 睁 (zhēng), which specifically means 'to open the eyes' — often implying effort, alertness, or awakening — and 开 (kāi), meaning 'to open' in a general sense. Together, they form a common, natural collocation used almost exclusively for eye-opening actions, not other body parts or objects.

This verb is frequently used in contexts of waking up, regaining consciousness, noticing something suddenly, or shifting from sleep or drowsiness to awareness. It carries a subtle nuance of intention or conscious effort — unlike simply 'opening eyes', it often suggests emerging from darkness, sleep, or distraction. It’s neutral in register and appears widely in spoken and written Chinese, especially in narrative, descriptive, or instructional language about daily routines or physical states.