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energy
/ˈɛnəd͡ʒi/
In a technical sense, it refers to the invisible capacity to perform work. It is neutral and scientific, focusing on resources like electricity, fuel, or heat.
When applied to people, it shifts toward vitality and stamina. This usage is generally positive, describing the internal 'fuel' that allows someone to persist through a task without tiring.
In social or atmospheric contexts, it describes a vibe or emotional intensity. It refers to an intangible force of personality—such as "chaotic energy" or "positive energy"—that affects the mood of a room or a group.
Uncountable when referring to physics-based power ('renewable energy') or a person's general vitality ('she has so much energy'). Countable when describing specific types of distinct vibes or personality styles ('the room had several different energies clashing').
💬Casual Conversation
I'm totally tapped out. I have zero energy for this next chapter.
Same, but we can't just flake now. We're almost done.
Meanings
The power derived from physical or chemical resources to provide light and heat, or to work machines.
Solar panels convert sunlight into electrical energy.
Examples
Solar panels convert sunlight into electrical energy.
After a long nap, she felt full of energy again.
The new manager brought a fresh energy to the office environment.
Collocations & Compounds
renewable energy
Energy from a source that is not depleted when used, such as wind or solar power.
energy efficiency
The goal of reducing the amount of energy required to provide products and services.
burst of energy
A sudden increase in physical or mental vitality.
energy crisis
A significant shortage of available fuel or power resources.
high energy
Possessing a great deal of vitality, enthusiasm, or activity.
Idioms & Sayings
burst of energy
A sudden, short period of high activity or vitality.
drain someone's energy
To exhaust a person's physical or mental strength.
put your energy into something
To devote a great deal of effort and enthusiasm to a particular task.
low on energy
Feeling tired or lacking the vitality needed for activity.