This is the 163rd most frequent Finnish word.
tuo
"That" (demonstrative pronoun).
Here, 'tuo' is a demonstrative pronoun used to specify a distant object, translated to 'that' in English.
Tuo kirja on mielenkiintoinen.
That book is interesting.
In this sentence, 'tuo' is the verb form meaning 'brings' in the third person singular.
Hän tuo ruuat illalliselle.
He/She brings the food for dinner.
Here, 'tuo' again acts as a demonstrative pronoun, emphasizing 'that' beautiful song admired by the speaker.