their

1 of 1determiner

/ðɛr/

1

(third-person plural possessive determiner) of or belonging to people, animals, or things that have already been mentioned or are easy to identify

The students are proud of their achievements.
The neighbors painted their house blue.
The cats groom their fur meticulously.
The hikers pitched their tents near the lake.
The athletes trained hard to improve their skills.