One incapable of being tired
One Word SubstitutionsHARD
Indefatigable
One incapable of being tired
One Word SubstitutionsHARD
Indefatigable
Learning Progress
Examples
"Her indefatigable energy kept the project moving even through setbacks."
"An indefatigable campaigner can inspire volunteers and donors alike."
Source: One Word SubstitutionsAdded: 11/13/2025
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Words Being Learned104
Words Mastered238
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