Learn Romanian: Nu am parola. - I do not have the password.

In Romanian, you do not usually need to say eu (I) because the verb form already tells you who the subject is. The verb am means 'I have', so saying eu nu am is grammatically correct but optional. Native speakers usually just drop the pronoun and say nu am.

Where is the word for 'the' in this sentence?

In Romanian, the word for 'the' (the definite article) is not a separate word that goes in front of the noun like it does in English. Instead, it attaches to the very end of the noun.

The dictionary says the word for 'password' is parolă. Why does it end with an -a here?

That shifted ending is exactly how Romanian adds 'the' to this noun! For most feminine nouns that end in -ă (like parolă), you change the final -ă to an -a to mean 'the'. So, parolă is 'password' and parola is 'the password'.

Is it always this simple to make a negative sentence?

Yes! To make a verb negative in Romanian, you simply put the word nu (which means 'no' or 'not') directly in front of the verb. Since the verb here is am (I have), putting nu in front of it creates nu am (I do not have).