Ikuisuutta is a conjugation of the word ikuisuus. Ikuisuus means eternity. Ikuisuutta is a conjugation that is used in some contexts. The post suffix -tta especially denotes something to be an object for an action, but it can also denote that your action involves the whole object. So ikuisuutta either means eternity (as an object in your sentence) or then it literally means the whole eternity.
As an example, "I don't want to wait an eternity" would be "En halua odottaa ikuisuutta".
In this case it actually literally means that you don't want to wait the whole eternity in Finnish, though the intended meaning is different from the literal one.
Pleb is not a Finnish word.
You mean why the word 'Finnish' has two n's in it? That's just how the word is spelled...
Nokia is a town and a municipality in Finland, but the word itself doesn't mean anything in Finnish.
The word sauna is an ancient Finnish word referring to the traditional Finnish bath as well as to the bathhouse itself.
Lehto means "Grove".
That word is not Finnish.
Pleb is not a Finnish word.
posi is not a finnish word ....
Servo in Finnish is a loan-word from the English word servomechanism or servo.
You mean why the word 'Finnish' has two n's in it? That's just how the word is spelled...
It is a popular Finnish first or second name.
Nokia is a town and a municipality in Finland, but the word itself doesn't mean anything in Finnish.
The word sauna is an ancient Finnish word referring to the traditional Finnish bath as well as to the bathhouse itself.
Lehto means "Grove".
Jockey
Quark (cheese)
It is the word for Finland in the Finnish language.