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efficient▼(making good use of resources)adjective[UK: ɪ.ˈfɪʃnt] [US: ə.ˈfɪ.ʃənt]
inefficient▼(not efficient; not producing the effect intended or desired)adjective[UK: ˌɪ.nɪ.ˈfɪʃnt] [US: ˌɪ.nə.ˈfɪ.ʃənt]
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