Questions & Answers about Мой дом старый, зато уютный.
Зато is a coordinating conjunction used to introduce a positive or compensating fact in contrast to a negative one. While но simply means but (neutral contrast), зато carries the nuance of “but at least”, “yet”, or “on the bright side”.
Example:
• Мой дом старый, но холодный. – My house is old but cold.
• Мой дом старый, зато уютный. – My house is old, but at least it’s cozy.
The noun дом is masculine, singular, and in the nominative case. In Russian, all adjectives and possessive pronouns must agree with the noun’s gender, number, and case. That’s why you get:
• мой (masc. nom. sg.)
• старый, уютный (masc. nom. sg. adjective endings)