Learn Croatian: Navečer često razmjenjujemo skrivene misli. - We often exchange hidden thoughts in the evening.

The singular dictionary form is misao (thought), which is a feminine noun of the i-declension. This group of nouns doesn't end in the typical -a. For these nouns, both the nominative and accusative plural cases always end in -i, giving us misli.

What case is skrivene misli in, and how do we know?

It is in the accusative plural because it is the direct object of the verb razmjenjujemo (we exchange). For feminine i-declension nouns, the accusative plural ends in -i (misli), while the adjective agreeing with it takes the standard feminine accusative plural ending -e (skrivene).

Why use razmjenjujemo instead of its perfective counterpart razmijenimo?

The adverb često (often) tells us this is a repeated, habitual action. Whenever an action is ongoing or repeats routinely, Croatian requires an imperfective verb like razmjenjivati. You would use the perfective razmijeniti for a single, completed exchange.

Is the adverb navečer related to the feminine i-declension noun večer?

Yes! Navečer is a fixed adverb meaning "in the evening," created by fusing the preposition na (on/at) with the noun večer (evening). You will see this pattern frequently in Croatian time expressions.