This is the 1620th most frequent Russian word.
час
"Час" means "hour" in English.
The word 'час' is used here to denote a unit of time: an hour.
Час работы прошёл незаметно.
An hour of work passed unnoticed.
The word 'час' is used within the idiomatic expression 'час пик' which translates to 'rush hour,' indicating a certain time period.
В час пик ездить в метро очень сложно.
Traveling by subway during rush hour is very challenging.
The word 'час' is utilized to indicate a future unit of time: an hour later.