trudnoci
Trudnoci is not a standard term in widely used encyclopedic Polish, and it is typically a misspelling or variant spelling of the Polish word trudności, the plural of trudność, meaning difficulties or hardships. Because there is no established definition for "trudnoci" in major dictionaries, discussions about it usually refer to the broader concept of difficulties using the standard forms.
Etymology and meaning: The root trud- appears in several Slavic languages; in Polish, trudność denotes something
Usage: In everyday language, one may speak of trudności w nauce (learning difficulties) or trudności techniczne
See also: Related terms include trudność (singular), kłopot, wyzwanie, przeszkoda, and in other languages, corresponding words