This is the 2369th most frequent Catalan word.
mitjan
"Mitjan" in Catalan means "average" or "middle."
In this sentence, 'mitjan' is used as a noun meaning 'means', indicating the medium or method by which something (transport) is accomplished.
El mitjan de transport és essencial en aquesta ciutat.
The means of transportation is essential in this city.
Here, 'mitjan' modifies 'temperatura', functioning as an adjective meaning 'average', and relates to quantitative assessment.
Hem calculat la temperatura mitjana de la setmana passada.
We calculated the average temperature of last week.
In this usage, 'mitjan' refers to a temporal midpoint, describing the middle portion of the year as a noun.