Learn Croatian: Moji roditelji su rezervirali polupansion u hotelu. - My parents booked half-board at the hotel.

The verb rezervirati is bi-aspectual. Like many foreign loanwords ending in -irati (such as parkirati or organizirati), it does double duty and acts as either perfective or imperfective depending on the context. In this sentence, it functions as a perfective verb to show a completed action.

The noun roditelj ends in a palatal consonant. Since it is masculine, shouldn't its plural use the long infix -ev-?

Normally, many masculine nouns take the long plural infix -ov- or -ev-. However, nouns ending in the suffix -telj (like roditelj, prijatelj, and učitelj) are exceptions. They always take the short plural ending without the infix, which is why we get roditelji.

This sentence uses the compound word polupansion for half-board. How would I say full-board?

To say full-board, you use two separate words: puni pansion. Unlike polupansion, which merges the prefix polu- (half) with the noun, puni (full) acts as a standard adjective modifying the noun.

Why is u hotelu in the locative case here instead of the accusative?