Final answer:
The word that does NOT contain the root word 'magn-' is 'command'.
Step-by-step explanation:
The word that does NOT contain the root word 'magn-' is option d) command. The root word 'magn-' refers to greatness or large size. Option a) 'magnanimous' means generous or forgiving, option b) 'magnificent' means grand or splendid, and option c) 'magnitude' means the great size or extent of something.
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