Noun energy (Plural: energies) The impetus behind all motion and all activity. Translations Bulgarian: енергия f Dutch: energie f French: énergie f German: Energie f Hebrew: אנרגיה f Interlingua: energia Italian: energia f Japanese: エネルギー (enerugī) Polish: energia f Portuguese: energia f Romanian: energie f Swedish: energi c Units Customary: calories, kilocalories (i.e., dietary calories) Metric: joules (J), kilojoules