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expediency [expediencies]▼(quality of being fit or suitable to effect some desired end)noun[UK: ɪk.ˈspiː.dɪən.si] [US: ɪk.ˈspiː.diən.si]
efficacy [efficacies]▼(ability to produce effect)noun[UK: ˈe.fɪk.ə.si] [US: ˈe.fɪˌk.æ.si]
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