What does inexhaustible mean?
Inexhaustible describes something that cannot be used up, depleted, or brought to an end. It is especially common in references to supplies, reserves, energy, patience, creativity, and curiosity: a natural resource may be called inexhaustible, while a person may possess inexhaustible enthusiasm or determination. The word conveys the idea of apparently limitless abundance or persistence, but it can also be rhetorical and should not automatically be taken to mean that a resource is literally unlimited. Compared with endless, inexhaustible more often suggests that something cannot be depleted, whereas endless focuses on the absence of a final stopping point. It is a useful word for describing both vast material abundance and sustained human effort, though careful writers often qualify it with words such as seemingly when the claim is figurative.
adjectiveIncapable of being used up or exhausted; existing in a seemingly limitless supply or continuing without end.
- Incapable of being used up or exhausted, especially a supply, source, or reserve of something.
- Existing or continuing without end or limitation.
"The region’s inexhaustible reserves of clean water make it an attractive place for agriculture."
"Her inexhaustible curiosity led her to study languages, history, and mathematics."
"The campaign depends on the seemingly inexhaustible enthusiasm of its volunteers."
Some resources seem inexhaustible until a discovery reveals that every generation is borrowing from the next.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does inexhaustible come from?
The word comes from Latin inexhaustus, meaning “not exhausted” or “not drained,” formed from in- meaning “not” and exhaustus, the past participle of exhaurire, “to drain out” or “to exhaust.” English borrowed the Latin form in the 17th century, and the modern adjective was developed from it through the common English derivative exhaust and its related forms.
Related word forms
How inexhaustible is actually used
The word is often used figuratively for energy, enthusiasm, or creativity. It can be slightly rhetorical or promotional, especially in descriptions of resources or personal qualities.
Easily confused with inexhaustible
Unending means continuing forever, whereas inexhaustible usually describes a resource, supply, or source of energy that cannot be used up.