Beautiful

The correct spelling is "beautiful" because it follows standard English spelling rules. Here’s a breakdown:
- Root Word: The word comes from "beauty", which means something that is pleasing to the eye or mind.
- Suffix Addition: When adding the suffix "-ful" (meaning "full of"), it becomes "beautiful."
- Common Mistake: Some people mistakenly write "beautifull", but that would imply an unnecessary extra "l"—which isn’t needed in English spelling.