No. 1,634 in Polish

nieoficjalnych

"Nieoficjalnych" means "unofficial."

In a sentence

Spotkałem się z nieoficjalnych źródeł.
I came across unofficial sources.
used to refer to something not confirmed or not official
Podano informacje pochodzące z nieoficjalnych raportów.
Information from unofficial reports was provided.
'Nieoficjalnych' is used as an adjective to describe reports that are not sanctioned officially.
Relacje świadków były oparte na nieprzetworzonych i nieoficjalnych danych.
Witness accounts were based on unprocessed and unofficial data.
Describes the nature of data as not being officially recognized or processed.

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