This is the 2103rd most frequent German word.
zur
"Zur" is a contraction of "zu der," meaning "to the" (feminine dative) in English.
Here, 'zur' is a contraction of 'zu der', which means 'to the' and is used with feminine nouns. 'Schule' is feminine in German.
Ich gehe zur Schule.
I am going to school.
In this sentence, 'zur' combines 'zu der', indicating motion towards a feminine noun, here 'Party'.
Sie ging zur Party gestern Abend.
She went to the party last night.
'Zur' again is 'zu der' and connects 'zu' with the feminine noun 'Arbeit', showing direction towards a place.