bez przygotowania in inglese:

Take a deep and calming breath before you give an impromptu speech.

Great impromptu must be spontanious.

The Beatles gave an impromptu performance on the rooftop of the Apple building in central London.

I called a few friends and we had an impromptu party

The pianist gave an impromptu concert.

impromptu speech

She stood up and gave an impromptu speech.

an impromptu party/performance

... give a five- minute impromptu speech on your personal...

taking impromptu shots

[adjective] done or said without earlier planning or preparation: The pianist gave an impromptu concert. / 2. an impromptu party/performance

"Footballs were retrieved from among the luggafe and impromptu games began."

an impromptu party/performance Footage showed Mr Trudeau, UK PM Boris Johnson and French leader Emmanuel Macron discussing an impromptu press conference held by Mr Trump.

A musician friend of mine gave an impromptu performance of a piece he had just finished composing.