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efficacy [efficacies]▼◼◼◼noun[UK: ˈe.fɪk.ə.si] [US: ˈe.fɪˌk.æ.si]
efficiency [efficiencies]▼◼◼◻noun[UK: ɪ.ˈfɪʃn.si] [US: ə.ˈfɪ.ʃən.si]
potency [potencies]▼◼◼◻noun[UK: ˈpəʊtn.si] [US: ˈpoʊtn.si]
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