L.2.4
Determine or clarify the meaning of unknown and multiple-meaning words and phrases based on grade 2 reading and content, choosing flexibly from an array of strategies.
L.2.4.c
Use a known root word as a clue to the meaning of an unknown word with the same root (e.g., addition, additional).
L.3.4.c
Use a known root word as a clue to the meaning of an unknown word with the same root (e.g., company, companion).