流产 (liú chǎn) is a noun referring to the medical event of a miscarriage (spontaneous abortion) or induced abortion. It is also used figuratively to mean the failure or collapse of plans, projects, or efforts, as in 计划流产 ('the plan fell through'). Although this entry treats 流产 as a noun, in everyday speech it is very often used as a verb (e.g., 她流产了 'she had a miscarriage'). Pay attention to the metaphorical extension in business or planning contexts.