This is the 359th most frequent Ukrainian word.
знищили
Destroyed.
Here, 'знищили' is used to describe the act of physically destroying or demolishing something.
Вони знищили стару будівлю.
They demolished the old building.
In this sentence, 'знищила' conveys the action of severely damaging or ruining something, in this case, the crop, where it may not necessarily be a deliberate act but a consequence of natural events.
Сильна буря знищила врожай.
The strong storm ruined the crop.
Here, 'знищила' is used metaphorically to imply the deliberate or thorough removal or resolution of the doubts.