This is the 237th most frequent Lithuanian word.
kita
"Other" or "next."
In this sentence, 'kita' is used as an adjective meaning 'next,' referring to the subsequent day.
Kita diena bus šilta.
The next day will be warm.
Here, 'kita' operates as a pronoun, meaning 'the other' or 'the next,' replacing the noun 'week'.
Vieną savaitę jis dirbo viename mieste, o kita - kitame.
One week he worked in one city, and the next - in another.
In this context, 'kita' is part of a phrase 'kita vertus,' meaning 'on the other hand,' used to introduce a contrasting point.