1. Characterized by hard work and perseverance
   - industrious, tireless, untiring

See also: diligent

• deter
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• detergence
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• detergent builder
• deteriorate
• deterioration
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• determinable
• determinacy
• determinant
• determinate
• determinateness
• determination
• determinative
• determinator
• determine
• determined
• determinedly
• determiner
• determining
• determining factor
• determinism
• determinist