Most difficult to say
There’s no doubt about it, some words are more difficult to pronounce than others. I’ve always found ‘sixths’ tricky to get my lips around. The short, quick syllables of ‘veterinary’ reduce most of us to saying simply ‘vet’. But there are even greater challenges. I certainly wouldn’t like to attempt ‘autochthonicism’ or ‘paraepithelial’ in a hurry. I’m sure there is a wealth of words in other languages that present the human tongue with similar difficulties. Any other twisters out there?'
