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in the PONS Dictionary

efficientia <ae> f (efficio)

efficientia
Wirksamkeit [ solis ]
Declension of efficientia
Case Singular Plural
Nominative efficientia efficientiae
Genitive efficientiae efficientiārum
Dative efficientiae efficientiīs
Accusative efficientiam efficientiās
Ablative efficientiā efficientiīs
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