Translation guide
Describes something that cannot be used up or tired out. In Japanese, this idea is expressed through adjectives and set phrases depending on whether you mean physical resources, abstract qualities, or personal energy.
To describe a supply, source, or quality that is limitless and cannot be depleted.
To describe someone who never seems to get tired, bored, or impatient.
For most everyday situations, use 尽きることがない for resources or abstract things, and 疲れを知らない or 飽きることがない for people. 無尽蔵 is more formal and often used in writing or speeches.
Directly translating 'inexhaustible' as 無消耗 (むしょうもう) or similar made-up compounds will not be understood. Stick to the natural phrases above.
The geothermal energy in this region is inexhaustible.
A common, natural phrase meaning 'never runs out' or 'endless'. Can be used for both concrete and abstract things.
His curiosity is inexhaustible.
The water in this well is inexhaustible.
A shorter, more literary form of 無尽蔵. Often used in compounds or set phrases.
inexhaustible resources
A poetic phrase meaning 'no matter how much you draw, it never runs out'. Used for wells, springs, or metaphorically for wisdom, creativity, etc.
His knowledge is like an inexhaustible spring.
She is an inexhaustible worker.
Means 'never gets bored of' or 'never tires of'. Used for inexhaustible interest or enthusiasm.
He has an inexhaustible appetite for new hobbies.
A four-character idiom meaning 'indomitable' or 'unyielding'. Describes inexhaustible spirit or perseverance.
He overcame the crisis with inexhaustible determination.