freefall

中文： 自由落体

1. A state of motion affected by no acceleration or force other than that of gravity. (countable, uncountable)
2. A state of motion but allowing for the presence of incidental air resistance not caused intentionally by devices such parachutes or wings. (countable, uncountable)
3. A rapid, uncontrolled decline or worsening. (countable, figuratively, uncountable) · As civil war continues in Iraq, the U.S. president's approval ratings are in freefall.

复数 freefalls