underperformWiktionary 原文构词拆分under-前缀Beneath, under · (figurative) To go from one side to the other; to progress along a path+perform词根/词干词源说明From under- + perform.释义（英文）动词 Verb(ambitransitive) To underachieve; to fail to reach standards or expectations, especially with respect to a financial investment.词族派生词（2）underperformanceunderperformer