I found this really interesting...
Well, as you may already know, there is a significant amount of loanwords in English from other languages, and, of course, vice versa. A loanword is a word borrowed from other languages, and like you might have noticed already, they might sound or look similar to their language of origin.
So, let's see if you can guess the origins of the words below (without Googling, that is ;)):
tsunami
oxygen
guitar
sky