努力

1. Origins, structure, and basic meaning

• Structure: 努力 (どりょく) means sustained exertion toward a goal. It appears as a cause of results and an action continued.
• Basic usage: Daily effort gradually appears in results; a speaker continues working toward a goal.

2. Common pitfalls and similar expressions

• Persistent work visible in results and action maintained toward a goal
  • 努力が is the cause producing an outcome; 努力を続ける is consciously maintained activity. Effort is not identical to success itself.