CCR Anchor 4: Determine or clarify the meaning of unknown and multiple-meaning words and phrases by using context clues, analyzing meaningful word parts, and consulting general and specialized reference materials, as appropriate.
Determine or clarify the meaning of unknown and multiple-meaning words and phrases, choosing flexibly from an array of strategies.
b. Determine the meaning of the new word formed when a known prefix is added to a known word (e.g., happy/unhappy, tell/retell).
More information and the complete College and Career Readiness Standards can be found here.