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concentration

mastery

UK /ˌkɒn.sənˈtɹeɪ.ʃən/ US /ˌkɑn.sənˈtɹeɪ.ʃən/noun

card 1 of 10 · synonym

Which word is closest in meaning to 'concentration' in this sentence?

The student's concentration was so deep that she didn't hear the bell.