Learn Romanian: Ajungem la aeroport cu taxiul. - We arrive at the airport by taxi.

In Romanian, the ending of the verb usually tells you who is doing the action. Ajungem ends in -em, which means 'we arrive'. You can add the pronoun noi (noi ajungem) for emphasis, but it is completely optional and usually left out.

Does la mean 'at' or 'to' in this sentence?

The preposition la can mean both 'at' and 'to' depending on the verb. With the verb a ajunge (to arrive), it translates to 'at' the airport. If the verb was a merge (to go), it would mean 'to' the airport.

Why does aeroport not have a definite article ('the'), but taxiul does?

This is a tricky rule about Romanian prepositions! After the preposition la (at/to), singular masculine and neuter nouns like aeroport do not use 'the' at the end. However, when talking about modes of transport using cu (with/by), the vehicle must take the definite article -ul, making it taxiul (literally 'with the taxi').

I learned that cu means 'with'. Why is it translated as 'by' here?

While cu literally translates to 'with', it is the standard preposition used in Romanian for modes of transportation. So, instead of saying 'by taxi', a Romanian says 'with the taxi' (cu taxiul). You will also see this in phrases like cu trenul (by train) or cu mașina (by car).