In my training days, I used to show one of the John Cleese management films "Decisions, decisions" which, in one scene, has Nigel Hawthorne (I think) saying the word 'arbitrarily' (with the accent on the first syllable). It took me a few viewings, initially, to work out what the word actually was -- and, even now, I don't think it's a word that I would attempt to say in public.