注视 means 'to gaze intently at' — to look steadily and with focused attention, often conveying curiosity, concern, admiration, or concentration. The first character 注 (zhù) means 'to pour' or 'to concentrate', suggesting directed focus; the second character 视 (shì) means 'to look' or 'to see'. Together, they form a compound verb emphasizing sustained, purposeful looking — not just glancing, but observing closely with mental engagement.

This word is commonly used in descriptive writing, psychological contexts, or narratives where attention or emotional intensity matters — for example, when describing someone watching another person during an important moment, studying an object carefully, or reacting to something surprising. It carries a slightly formal or literary tone and appears frequently in novels, films, and news reports, but is also natural in everyday speech when emphasis on attentiveness is needed.