This is the 2771st most frequent Russian word.
марьинском
"Марьинском" is the locative or prepositional form of "Марьинский," relating to "Maryinsky" (a place or proper noun).
Used as a proper adjective denoting a specific location associated with 'Maryino'.
Я был вчера в Марьинском парке.
I was in Maryinsky Park yesterday.
Functions as an adjective describing a geographic entity, 'шоссе', related to 'Maryino'.
Марьинском шоссе часто бывает забито пробками.
Maryinsky Highway is often congested.
Adjectivial usage pertaining to an event or occasion termed 'Марьинское собрание'.