Translation of erode in Spanish

We wanted to take a hot shower but there was no hot water at all. We asked someone to fix it and he showed us that there was a heating switch outside the bathroom which would turn on the boiler.
Well I take Spanish classes in college, that's the only useful language they offer, but if they had French I would be taking French. It sounds so nice. I have been lazy lately and I'm not really good at it.
A band was playing Peruvian music while we were waiting for our luggage. The altitude is immediately felt: Dark blue skies and thin air, which won't let you climb stairs without having to take a few breaks.