屏息 literally combines 屏 (bǐng), meaning 'to suppress or restrain', and 息 (xī), meaning 'breath'. Together, they form a verb meaning 'to hold one’s breath' — physically stopping inhalation and exhalation, often due to intense emotion, concentration, fear, awe, or suspense. It describes a conscious, temporary suspension of breathing, not unconscious cessation.

This word is commonly used in literary, descriptive, or dramatic contexts — for example, when someone is startled by something unexpected, deeply focused on a delicate task, or captivated by beauty or danger. While it can appear in spoken Chinese, it carries a slightly formal or vivid tone, making it more frequent in writing, storytelling, or expressive speech than in casual daily conversation. It is rarely used in medical or physiological discussions (where terms like 呼吸暂停 are preferred).