If someone asked you to spell appoggiatura, ursprache or xanthosis out loud, how do you think you’d do? If you’ve ever studied Italian, German, Latin or Greek you might have an easier time of it. But for the rest of us, the task would be a considerable challenge.
That’s because all three of these words have roots in other languages and contain infrequent consonant clusters, not to mention sounds that are not typically represented by their corresponding English letters. For this reason, they are considered very hard to spell.