задует

задует

"Задует" means "will blow" or "will start blowing" (referring to wind).

Here 'задует' refers to the wind entering the room through an open window, indicating the start of the blowing action.

Если не закрыть окно, задует ветер.

If the window isn't closed, the wind will blow in.

In this context, 'задует' signifies the fan initiating the action of blowing air.

Включи вентилятор, чтобы он задул прохладный воздух.

Turn on the fan so it can blow cool air.

Here, 'задул' conveys the action of the wind starting to blow strongly, emphasizing its impactful nature.

На улице так холодно, что пробирает даже сквозь толстую одежду, если задул ветер.

It's so cold outside that it penetrates even through thick clothes when the wind starts blowing.