The Path of Motion
You already know that the Instrumental case can describe tools or companions. It has another use: describing the path or route of a journey.
When moving through an open area or along a path, Croatian often uses the bare Instrumental case—without prepositions. The case itself expresses the traversal of a space.
| The hero is wandering through the dark forest. | Junak luta mračnom šumom. |
Notice how both the adjective mračna (dark) and the noun šuma (forest) take the feminine Instrumental ending -om.
Through the Wilderness
This works beautifully for journeys through various terrains.
| Do not ride through the hot desert! | Nemojte jahati vrućom pustinjom! |
| We sailed through the endless sea towards the hidden kingdom. | Plovili smo beskrajnim morem prema skrivenom kraljevstvu. |
Notice the neuter noun more takes the ending -em, while its adjective takes the neuter/masculine Instrumental ending -im (beskrajnim).
Moving Along
The bare Instrumental can also mean moving "along" a specific path or boundary.
| The hero is stepping carefully along the edge of the chasm. | Junak oprezno korača rubom provalije. |
Here, the masculine noun rub (edge) becomes rubom. The hero is moving along the edge, rather than through it.
Verbs of Motion
You will naturally see this construction paired with continuous movement verbs like lutati (to wander), jahati (to ride), hodati (to walk), and letjeti (to fly).
| The king and the elf are riding through the enchanted kingdom. | Kralj i vilenjak jašu začaranim kraljevstvom. |
| The dragon flew through the chasm and fell. | Zmaj je letio provalijom i pao. |