What is the root word of unclear clearly and cleared?

The root word of "unclear", "clearly", and "cleared" is clear.

Here's how it works:

* Unclear: The prefix "un-" means "not", making it the opposite of "clear".

* Clearly: The suffix "-ly" turns the adjective "clear" into an adverb.

* Cleared: The suffix "-ed" indicates the past tense of the verb "to clear".