no energy
Running on empty
No energy describes a state of physical or mental exhaustion, lacking the vitality needed to act: I have no energy to cook tonight, She woke up with no energy.
The phrase often signals depletion rather than mere tiredness—suggesting reserves have run dry rather than just feeling sleepy.
- tiredLacking energy, needing rest
- dead tiredExtremely exhausted state
- exhaustedUtterly depleted of energy
- drainedEmptied of resources
- worn outDepleted through overuse
fatigued · lethargic · sluggish · weary · listless · depleted · running on empty · burnt out · empty · low battery · flat · rundown · wiped · spent · out of gas · drowsy · limp · feeble
physical vitality
no energyenergetic
Having much vigor
full of energy · vigorous · peppy · vital · robust
energy, energies, energetic, energetically, energize, energized, energizing, energizer, ergonomic