This is the 4742nd most frequent Swedish word.
arvid
"Arvid" is a Swedish male given name, not a word with a specific meaning.
In the final sentence, 'Arvids' demonstrates possession, indicating that the playful cat belongs to someone named Arvid. The word acquires a genitive form shown by the appended 's'.
Arvids katt är mycket lekfull.
Arvid's cat is very playful.
In this sentence, 'Arvid' is used as a proper noun that refers to a person's name.
Arvid är en trevlig person.
Arvid is a friendly person.
Here, the word 'Arvid' continues its use as a proper name, identifying an individual encountered in the scenario.