Learn Croatian: Mi darujemo besplatnu odjeću.

This is a great example of an -ovati verb! When conjugating verbs that end in -ovati in the present tense, the -ova- part drops out and is replaced by -uj-. Then, we add the normal present tense ending for "we". So, darovati becomes daruj- + -emo = darujemo (we donate).

The English translation says "clothes", which is plural. Why is odjeću in the singular form?

In Croatian, the word for clothes, odjeća, is a collective noun. This means it acts like a singular feminine word, even though it describes multiple items. It functions a lot like the English word "clothing". Because of this, it takes singular endings.

Why do besplatnu and odjeću both end in -u here?

Because "free clothes" is the direct object of the verb darujemo (it is what is being donated), the phrase needs to be in the accusative case. Odjeća is a feminine noun, and feminine singular nouns change their -a ending to -u in the accusative. The adjective must match the noun, so besplatna also changes its -a to -u to become besplatnu.

If the dictionary word for "free" is besplatan, why isn't the feminine form instead of ?