隐患 (yǐn huàn): อันตรายที่ซ่อนอยู่ภายใน sth

The wiring in this old building has been in use for over forty years; after inspecting it, the firefighters said there was a serious hidden fire risk and it had to be replaced immediately.

The doctor warned him that staying up late for a long time may not show problems for now, but it is a major hidden danger to health and will eventually cause illness.

The company's financial system was not strict, leaving a hidden risk for embezzlement; last year an accountant misappropriated public funds.

This section of the riverbank looks solid, but termites have hollowed out the inside, making it a major hidden danger for flood control.

He always speaks ambiguously, which has planted a hidden danger for teamwork; recently everyone has argued several times because of misunderstandings.