This is the 95th most frequent Polish word.
wtorek
"Wtorek" in English means "Tuesday."
Here, 'wtorek' is used as a noun modified by the adjective 'zeszły', indicating a specific occurrence of the day in the past.
W zeszły wtorek poszedłem na spacer po parku.
Last Tuesday, I went for a walk in the park.
In this example, 'wtorek' is part of a prepositional phrase ('we wtorek') indicating a point in time.
Spotkajmy się we wtorek o dwunastej.
Let's meet on Tuesday at twelve.
In this sentence, 'wtorek' is a noun acting as the subject of the sentence, referring to a day of the week.