Question

A _____ root needs other syllables to be used with it in order to be complete.

locked
bounded

Answer 1

The second kind of root word usually comes from Latin and cannot be used as a word by itself. Since it is not free to be used alone, and must have one or more syllables added to it, we will call it a locked root.

Step-by-step explanation:

Answer 2

Well basing off the definition of bounded I would say that's the answer but I've never heard of these roots before.