How to say "pertinent" in Japanese

• 適切てきせつJLPT N3approx.Common
  na-adjective, nounCovers 'pertinent' in its usual sense — relevant and appropriate to the matter at hand. The common word for 'appropriate; suitable', it is the default choice for a pertinent question or remark.
  「行いった」というのが適切てきせつな言葉ことばだ。↗

  "Performed" is the right word.
• 合目的的ごうもくてきてき
  na-adjectiveBuilt on the idea of according with a purpose, this less common word covers 'pertinent' when something is judged by whether it serves its aim — as in evaluating a design or plan.
• 好個こうこ
  nounEssentially 'excellent; fine'; its 'pertinent' sense applies to an example or instance that is well chosen. Seldom the word you want for 'pertinent' in general — it praises the choice rather than describing relevance.

For 'pertinent' meaning relevant and appropriate to the matter at hand, 適切 is the default; 合目的的 suits the idea of according with a purpose; 好個 only praises a well-chosen example, not general pertinence.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 適切てきせつappropriate
• 合目的的ごうもくてきてきpertinent
• 好個こうこexcellent
• 切実せつじつpertinent