'丢下' (diū xià) is a compound verb meaning 'to abandon' or 'to leave behind' — literally, 'to throw down' (丢) and 'down/behind' (下). The character 丢 conveys loss, discarding, or letting go, while 下 adds directional or resultative force, indicating something is left in a place or state after departure. Together, they emphasize intentional or sometimes regrettable separation — not just physical leaving, but emotional or relational withdrawal.

This verb is commonly used in both literal and figurative contexts: abandoning an object, deserting a person (e.g., a child or pet), quitting a responsibility, or even dropping out of a plan or group. It carries a negative or critical connotation — implying neglect, betrayal, or irresponsibility — and is rarely neutral. It frequently appears in narratives, news reports about social issues, or everyday complaints ('He just dropped everything and left!'). It’s often followed by a noun (e.g., 丢下孩子) or a clause (e.g., 丢下工作不管).