Sonder

Sometimes I don't think about how loud a room is until I leave it

Couldn't pass this one up without mentioning the vsauce video that mentions it. In my opinion, it's one of the best ones he's made. I highly recommend it!
The Science of Awkwardness
https://youtu.be/o268qbb_0BM
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Sonder is mentioned at about 12:24. Here's a direct link to that minute, if you don't have time for the whole thing:
https://youtu.be/o268qbb_0BM?t=745
- FunStats

'Sonder' means 'special' in German..(:

Sonder is from The Dictionary of Obscure Sorrows.

@thorspoptarts2 the whole reason I know about the word sonder is this post