Intensifying prefix for superlatives: very; of them all
köken: From aller, the genitive form of alle (“all”), from Middle High German al, from Old High German al, from Proto-Germanic *allaz. Compare English all-, English alder-.
aller- + erste (“first”) → allererste (“very first”)
aller- + größte Stadt (“the biggest city”) → allergrößte Stadt (“the very biggest city / the biggest city of them all”)
aller- + meist (“most”) → allermeist (“almost all”)
köken: Inherited from Old Anatolian Turkish چُوقْ (çoq), چوخ (çoḫ), from Proto-Turkic *čok (“many, very; to gather, multiply”). Cognate with Turkish çok, Gagauz çok, Crimean Tatar çoq, etc.
köken: Inherited from Early Old Oghuz اُرَنْ (ören, “bad”), from Middle Persian [Book Pahlavi needed] (ʾwylʾn' /awērān/). Doublet of weýran (“destroyed”).
köken: Etymology tree Proto-Indo-European *mreǵʰ- Proto-Indo-European *-us Proto-Indo-European *br̥ǵʰús Proto-Balto-Slavic *burźus Proto-Slavic *bъ̑rzъ Old Polish barzy Proto-Slavic *-o Old Polish -o Old Polish barzo Polish bardzo Inherited from Old Polish barzo. By surface analysis, barzy + -o. Displaced Old Polish wielmi. Compare typologically Russian ши́бко (šíbko) (akin to ши́бкий (šíbkij)).
aile: bajbardzo, bardzo dobry, nie bardzo, nie za bardzo
köken: From the Latin adjective fortis, fortem, from Old Latin forctis, fortis, from Proto-Indo-European *bʰerǵʰ- (“to rise, high, hill”). Compare the same semantic development in French fort, Occitan fòrça, Ligurian foart (attested in Menton, France). In older Romanian, the word was also used as a freestanding adverbial, in addition to simply as an intensifier.