Final answer:
The words nod, know, unknown, knowable, and knowledgeable all share the common root 'know' in English.
Explanation:
Roots in English: The common root shared among the words listed is 'know,' which comes from the verb 'to know.' Words that share this root are:
- know
- unknown
- knowable
- knowledgeable
Learn more about Word roots and commonalities in English words here:
https://brainly.com/question/49764207
