This is the 12744th most frequent Polish word.
nieskazitelnie
Impeccably.
Here, 'nieskazitelnie' emphasizes the spotless and perfect condition of the dress's color.
Suknia była nieskazitelnie biała.
The dress was impeccably white.
In this sentence, 'nieskazitelnie' refers to the thorough and flawless cleaning of the apartment.
Mieszkanie było wysprzątane nieskazitelnie przed przybyciem gości.
The apartment was impeccably cleaned before the guests' arrival.
The word 'nieskazitelnie' here highlights the faultless and highly commendable nature of her politeness.