Vocabulary Acquisition and Use4. Determine or clarify the meaning of unknown and multiple-meaning word and phrases based on grade 3 reading and content, choosing flexibly from a range of strategies.a. Use sentence-level context as a clue to the meaning of a word or phrase.b. Determine the meaning of the new word formed when a known affix is added to a known word (e.g., agreeable/disagreeable, comfortable/uncomfortable, care/careless, heat/preheat).c. Use a known root word as a clue to the meaning of an unknown word with the same root (e.g., company, companion).d. Use glossaries or beginning dictionaries, both print and digital, to determine or clarify the precise meaning of key words and phrases.