If you mean frost in the ground then it's routa in Finnish.
You wouldn't. Hammer is "Vasara" and frost is "ruota", "kuura", or "pakkanen", but NOBODY literally uses that. Sounds like a heavy metal song name.
For you is sinulle in Finnish.
How is miten in Finnish.
I am not Finnish. - (Minä) en ole suomalainen.
Finnish legend in Finnish is "suomalainen legenda".
Yes is "kyllä" in Finnish.
Boring is tylsä in Finnish.
Daughter is tytär in Finnish.
Black is musta in Finnish.
Food is ruoka in Finnish.
Library is kirjasto in Finnish.
Queen is kuningatar in Finnish.