Learn Croatian: Čarobnjak je pripremao opasnu čaroliju. - The wizard was preparing a dangerous spell.

Since we are focusing on narrative aspect, pripremao (was preparing) is used to set the background scene. It tells us an action was ongoing in the past, likely right before the main event of the story happened. If the sentence used the perfective pripremio (prepared), it would mean the action was completely finished and the story is moving on to the next event.

Why do the words opasna and čarolija end in -u here?

They are in the accusative case because the spell is the direct object receiving the action of the verb pripremao. For feminine singular nouns ending in -a like čarolija, the accusative ending is -u. The adjective opasna (dangerous) must match the noun, so it becomes opasnu.

Is there a connection between the words čarobnjak and čarolija?

Yes! They both share the root čar-, which relates to magic, charms, or spells. Recognizing this root will help you easily guess the meaning of other related words, like the adjective čaroban (magical) or the verb začarati (to enchant).

If I wanted to say just 'He was preparing a dangerous spell' without the word Čarobnjak, how would the word order change?