This is the 8257th most frequent Russian word.
мариуш
The word "мариуш" does not have a meaning in Russian; it is likely a misspelling, a name (e.g., Mariusz, a Polish name), or a non-standard term.
Proper noun 'Мариуш' refers to the subject of the sentence, a person's name.
Мариуш готовит вкусный обед для своей семьи.
Marius is preparing a delicious meal for his family.
Proper noun 'Мариуш' used in a question referring to any individual with that name.
Ты встречал человека по имени Мариуш?
Have you met a person named Marius?
Proper noun 'Мариуш' refers to a subject of discussion, existing in a different grammatical case (prepositional case here: о Мариуше).