Lapsi.
The Finnish word for 'boy' is "poika." It is commonly used in various contexts to refer to a young male child. The word is part of everyday language in Finland and can be used in both formal and informal settings.
In Finnish the word swamp is "suo".
The Finnish word for basket is kori.
Helki is not Finnish
The Finnish language is suomi (Finnish) or suomen kieli (Finnish language) in Finnish.
That word is not Finnish.
Pleb is not a Finnish word.
Coal is hiili in Finnish.
Village is kylä in Finnish.
Rain is sade in Finnish.
Little is pieni in Finnish.
Servo in Finnish is a loan-word from the English word servomechanism or servo.