This is the 708th most frequent Finnish word.
valko
"Valko" means "white" in English.
Here, 'valko' is a noun, referring to the color white, demonstrating its use in a general statement.
Valkoa käytetään paperin valmistamiseen.
White is used in the making of paper.
In this sentence, 'Valko' is a proper noun, used as someone's name, showing its use as a name or title.
Hänen nimensä on Valko.
His/her name is Valko.
In this sentence, 'valko' is used as a root for the adjective 'valkoinen', which means 'white' in describing a noun.