Related Clues:
- Capacity for action
- Power or vigorous activity
- Vigour or power
- Vigour, animation
- Capacity for activity
- Vigour, power
- Get-up-and-go, vitality
- Vigour, vitality
- Vigour, vim, vitality
- Healthy capacity for vigorous activity
- Exertion of force
- It's measured in joules
- Informal intellectual of ovoid type
- It's measured in joules or ergs
- Heed gag about slang intellectual