szybko

Szybko is a Polish adverb meaning "quickly" or "fast." It is the adverbial form derived from the adjective szybki (fast, quick) and is built from the root szyb- with the suffix -o. The word is invariable, meaning it does not change for gender, number, or case, and it typically modifies verbs to indicate the pace of an action.

In ordinary use, szybko appears in sentences such as Biegnij szybko (Run quickly), Musisz to zrobić szybko (You must do it quickly), or Mów do mnie szybko (Speak to me quickly). It also forms comparative and superlative degrees: szybciej means "faster," and najszybciej means "the fastest." The phrase jak najszybciej is common and means “as fast as possible” or “as soon as possible” (e.g., Zrób to jak najszybciej).

Related forms and terminology include szybki, the related adjective meaning "fast" or "quick," and szybkość, the noun meaning "speed" or "velocity." In some contexts, prędko is used as a more formal or technical synonym for "quickly," though szybki and szybko are far more common in everyday language.

Notes on usage: szybko is versatile and widely used in contemporary Polish across registers from casual speech to formal writing. It conveys tempo or efficiency of an action rather than a qualitative assessment, and it is typically placed directly before or after the verb it modifies, depending on emphasis.