windfall
/ˈwɪndfɔːl/noun
1- an apple or other fruit blown down from a tree or bush by the wind被风吹落的苹果（或其他果实）, 落果。
1.1
- a piece of unexpected good fortune, typically one that involves receiving a large amount of money意外好运气, （尤指数额巨大的）意外之财, 横财：
as modifier windfall profits.意外利润。