| efficienza | effectiveness |
| efficienza economico-ecologica | economical-ecological efficiency |
| Efficienza luminosa | Luminous efficacy |
| effigie | simulacrum |
| effimera | mayfly |
| effimero | fleeting |
| Effingen | Effingen |
| efflorescente | flourishing |
| efflorescenza | efflorescence |
| effluente | effluent |
| effluente agricolo | agricultural effluent |
| effluente industriale | industrial effluent |
| effluenti di frantoio | olive oil mill wastewater |
