skierowan
Skierowan is not a standard lexical item in Polish. In most contexts it appears as a nonstandard or misspelled form of the past passive participle of the verb skierować, whose correct form is skierowany. The root skier- comes from skierować, meaning to direct, aim, or channel. In standard usage the participle agrees with the gender and number of the noun it describes: masculine singular skierowany, feminine singular skierowana, neuter singular skierowane, and the corresponding plural forms such as skierowani and skierowane.
In practice, the proper forms are used in phrases like “list skierowany do inwestorów” (a letter directed
Notes on usage and confusion: Skierowan is generally considered a misspelling or nonstandard variant; standard Polish
See also: skierować, skierowany, skierowanie, skierowanie do lekarza.