This is the 440th most frequent Finnish word.
tuntia
The Finnish word "tuntia" means "hour" (partitive case).
Here, 'tuntia' is the partitive singular of 'tunti' (meaning 'hour'), used in its plural form as 'tunteja' to indicate a duration or measurement in time.
Olin siellä useita tunteja odottamassa.
I was there for several hours waiting.
In this sentence, 'tuntia' in the singular partitive expresses the duration of the action as one hour.
Hän puhuu suomea tuntia päivässä.
He speaks Finnish for an hour each day.
Here, 'tuntia' in the singular partitive describes a relation per unit of time, emphasizing the idea of rate or quantification of an event in time.