‘吞咽’ is a compound verb meaning ‘to swallow’ — the physical act of moving food or liquid from the mouth down the throat into the stomach. The first character 吞 (tūn) means ‘to swallow’ or ‘to gulp down’, often implying force or volume, while 咽 (yàn) specifically refers to the act of passing substances through the pharynx. Together, they form a standard, neutral-term verb used in both everyday speech and medical contexts to describe this essential bodily function.

This word emphasizes the complete physiological process — not just ingestion (吃) or drinking (喝), but the coordinated muscular action that moves material past the back of the throat. It’s commonly used when discussing eating difficulties, medical symptoms (e.g., pain while swallowing), or basic hygiene education. Unlike single-character 吞 or 咽, which can be ambiguous or literary, 吞咽 is unambiguous, modern, and preferred in clear, descriptive usage.