‘吐出’ (tù chū) means 'to vomit out' or 'to expel something from the mouth,' often referring to involuntary expulsion of stomach contents. The first character 吐 (tù) means 'to spit' or 'to vomit,' and the second character 出 (chū) means 'out' or 'to go out.' Together, they form a separable verb where 出 emphasizes directionality and completion — indicating that something is forcefully ejected outward from the body. It is commonly used in medical contexts, descriptions of illness, or figurative expressions (e.g., '吐出真相' — 'to reveal the truth').

This verb is typically transitive and requires an object (e.g., food, blood, bile). In spoken Chinese, it’s more common than formal synonyms like '呕吐' (ǒu tù), especially when specifying what is expelled. While often associated with physical illness, it can also appear in literary or metaphorical usage, such as '吐出心中的苦闷' ('to vent one’s inner distress'). Tone and context determine whether the meaning is literal or figurative.