What's your favourite word, and why?

English is a mongrel language, mixing Latin, Celtic, Norse, Germanic, and French influences among others. For logophiles asked to choose a favourite word, it's a veritable smorgasbord, cornucopia, panoply of options, and the choice perhaps impossible. Yet that's the challenge we're putting to you.

In your submission, simply tell us your favourite word in the English language and why. You can list honourable mentions if you want, but you must make a final selection and justify it. Mine? 'Lozenge'. It's just so tasty to say.