poldi = cloud (noun) (some things Google found for "poldi": a common term; The Museo Poldi Pezzoli is an art museum in Milan, Italy; a masculine first name which can be short for Leopold; user names; nickname for soccer player
Word derivation for "cloud":
Basque = hodei, Finnish = pilvi
Miresua = poldi
Given this new word, the word for "cloudy" becomes "poldisne". Good for talking about the weather.
I was thinking about creating a Miresua conlang word for "what", another question word, but that will require more thought.