This is the 15776th most frequent Polish word.
szybszej
"Faster" (feminine singular genitive or dative form).
Here, "szybszej" functions as an adjective in the genitive case, feminine singular, describing "pralki" to emphasize a quicker machine.
Zdecydowała się na zakup szybszej pralki.
She decided to purchase a faster washing machine.
In this sentence, "szybszej" is used as an adjective in the genitive case, feminine singular, modifying the noun "drogi" to describe a quicker path.
Szukała szybszej drogi do domu.
She was looking for a faster way home.
In this construction, "szybszej" serves as an adjective in the genitive case, feminine singular, qualifying the noun "hulajnogi" to specify needing a quicker scooter.