car

In a sentence

• El cotxe de la Maria és vermell.

  Maria's car is red.

  In this sentence, 'cotxe' is used as a noun meaning 'car', referring to a vehicle.

• No esperava que fos car comprar aquell cotxe.

  I didn't expect that buying that car would be expensive.

  Here, 'car' is used as an adjective meaning 'expensive', describing the nature of the purchase.

• Car, si hagués sabut que no t'agradaria, hauria escollit una altra cosa.

  Dear me, if I had known you wouldn't like it, I would have chosen something else.

  In this context, 'car' is an interjection which can be translated as 'dear me' or 'oh my', expressing surprise or an emotional reaction.