Learn Croatian: Nemojte dirati staklo jer je oštro. - Don't touch the glass because it is sharp.

In Croatian, a very common way to say "don't do something" is to use the helper word nemoj (for one person) or nemojte (for plural or formal situations) followed by the infinitive form of the main verb. Here, nemojte is paired with the infinitive dirati (to touch).

Could I just use the regular imperative and put ne in front of it?

Yes! You can also say ne dirajte staklo. Both ne dirajte and nemojte dirati mean the exact same thing and are used interchangeably in everyday speech.

Why does the adjective oštro end in -o?

Adjectives must match the gender of the noun they describe. Because staklo (glass) is a neuter noun ending in -o, the adjective for "sharp" must take the neuter ending -o, becoming oštro. If it were describing a masculine noun like nož (knife), it would be oštar.

Why is there no word for "it" in jer je oštro (because it is sharp)?