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Word

diligent

adjective C1
/ˈdɪlɪdʒənt/

Diligent describes someone who works carefully and consistently, showing steady effort and attention to detail.

diligent: Diligent describes someone who works carefully and consistently, showing steady effort and attention to detail.

Meanings

adjective

working hard in a careful and thorough way

adjective

showing steady, careful effort over time on a task or responsibility

diligent: showing steady, careful effort over time on a task or responsibility

Definition

If someone is diligent, they put in regular effort and take their responsibilities seriously. They work carefully, pay attention to details, and keep going even when a task is repetitive or difficult. The word often suggests reliability and thoroughness rather than speed.

Examples

  • She was diligent about revising her thesis, checking every reference and formatting detail before submission.
  • I try to be diligent in my training schedule, even when progress feels slow and repetitive.
  • They remained diligent during the audit, documenting each step so the team could verify the process later.
  • He is diligent in customer support, following up until the issue is resolved rather than rushing to close the ticket.

Common mistake

Learners often confuse diligent with intelligent; diligent means hardworking and careful, not necessarily naturally smart.