Mjesečna naknada je visoka.

to be

Breakdown of Mjesečna naknada je visoka.

• visok: high
• mjesečna naknada: monthly charge

Questions & Answers about Mjesečna naknada je visoka.

Why does mjesečna end in -a?

Because it is an adjective describing naknada, and it must agree with that noun in gender, number, and case.

• naknada is feminine
• it is singular
• here it is in the nominative

So the adjective takes the feminine singular nominative form mjesečna. The masculine form would be mjesečni, and the neuter would be mjesečno.

Why does visoka also end in -a?

For the same reason: it agrees with mjesečna naknada.

Even though visoka comes after je and works like the English adjective in is high, Croatian still makes it match the subject:

• naknada = feminine singular
• therefore visoka = feminine singular

So both mjesečna and visoka are feminine singular because both relate to naknada.

What does je mean here?