What is a hard word to prounous?

That depends on what you consider "hard"! Some words are tricky because of their spelling, others because of unusual sounds, and some are difficult for specific language backgrounds.

Here are a few examples:

Difficult due to spelling:

* Colonel: The "o" sounds like "uh" and the "l" is silent.

* Squirrel: The "ir" makes a unique sound.

* Worcestershire: This one is just plain hard!

Difficult due to unusual sounds:

* Pneumonoultramicroscopicsilicovolcanoconiosis: The longest word in the English language, with many challenging sounds.

* Supercalifragilisticexpialidocious: Another long one, but with a more playful sound.

* Schizophrenia: The "ch" and "ph" combinations can be tricky.

Difficult due to language background:

* Rhythm: This is a common example of a word difficult for English language learners.

* Pronunciation: Ironically, this word can be tricky to pronounce!

Let me know if you have a specific language in mind or if you'd like more examples!