What does the root word od mean?

The root word "od" doesn't exist in English or other major languages. It's possible you're thinking of a different word or prefix, or perhaps a typo.

Could you please provide more context or the word you're thinking of?

For example, you might be thinking of:

* "ode" - a type of lyrical poem, usually addressed to a specific person or thing.

* "odor" - a smell, especially a bad one.

* "odd" - strange or unusual.

* "old" - having lived for a long time.

Let me know if any of these are what you had in mind, or provide more information so I can help you figure out what you're looking for!