inexhaustible
Cannot be emptied
Inexhaustible describes something that cannot be used up or depleted.
An inexhaustible supply of energy never runs out.
Inexhaustible patience or enthusiasm seems limitless.
The word often appears in discussions of natural resources, where it marks a contrast with finite supplies: Solar energy is effectively inexhaustible.
By extension, an inexhaustible person has tireless energy or stamina.
Having no bounds
- limitlessWithout any boundaries
- unlimitedWithout bounds or restrictions
- unboundedHaving no limits
- immeasurableBeyond any quantification
incalculable · measureless · illimitable · unfathomable · vast · immense · fathomless · bottomless
Lasting without interruption
- everlastingLasting for all time
- unendingLacking any terminus
- unceasingNever coming to rest
- interminableWithout apparent conclusion
perennial · undying · timeless · ageless · immortal · incessant · continuous · uninterrupted
Persistently energetic
- indefatigableIncapable of wearying
- unweariedNot made tired
- relentlessContinuing without pause
- perseveringMaintaining effort despite difficulty
energetic · vigorous · untiring · dogged · tenacious · persistent · steadfast · resolute
Existing in abundance
- copiousExisting in abundance
- bountifulPlentiful and generous
- ampleFully sufficient, even excessive
- lavishAbundant beyond necessity
profuse · teeming · overflowing · generous · rich · lush · luxuriant · fecund
Able to endure long-term
- regenerativeAble to renew itself
- replenishingRestoring to fullness
- restorativePromoting return to health
- recyclableCapable of being remade
recoverable · perennial · recurring · continual · rebounding · resilient · self-sustaining
infinite
Having no bounds
immeasurable · incalculable · measureless · illimitable · unfathomable · vast · immense · fathomless · bottomless · depthless
perpetual
Lasting without interruption
- everlastingLasting for all time
- unendingLacking any terminus
- unceasingNever coming to rest
interminable · perennial · undying · timeless · ageless · immortal · incessant · continuous · uninterrupted · constant
unflagging
Persistently energetic
- indefatigableIncapable of wearying
- unweariedNot made tired
- relentlessContinuing without pause
persevering · energetic · vigorous · untiring · dogged · tenacious · persistent · steadfast · resolute · unyielding
plentiful
Existing in abundance
lavish · profuse · teeming · overflowing · generous · rich · lush · luxuriant · fecund · fruitful
sustainable
Able to endure long-term
- regenerativeAble to renew itself
- replenishingRestoring to fullness
- restorativePromoting return to health
recyclable · recoverable · perennial · recurring · continual · rebounding · resilient · self-sustaining
- Beyond Measureimmeasurable, incalculable, boundless, limitless, infinite
- Infinityinfinity, endless, eternal, boundless, limitless
inexhaustibleexhaustible
Able to be used up
finite · limited · depletable · bounded · scarce