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

See also: diligent

• torsion
• torsion balance
• torsional
• torsk
• torso
• tort
• torte
• tortellini
• tortfeasor
• torticollis
• tortilla
• tortilla chip
• tortillon
• tortious
• tortoise
• tortoise plant
• tortoiseshell
• tortoiseshell butterfly
• tortoiseshell turtle
• tortoiseshell-cat
• tortricid
• tortricid moth
• Tortricidae
• tortrix
• tortuosity