Vocapedia
Log inTry for Free

Looking up...

Explore

  • Words of the Year
  • Recent Lookups
  • Community Collections
  • How to Say

Dictionaries

  • English
  • Vietnamese
  • Japanese
  • Chinese
  • Spanish
  • French
  • Korean
  • German
  • Hindi
  • Italian

MY LEARNING

  • My Dictionary
  • My Collections
  • Reviews

Resources

  • Learning Resources
  • How It Works
  • Study Guides
  • Language Tips
  • FAQ
  • Getting Started
  • For Individuals
  • For Teachers

Community

  • Forum
  • Blog
  • Help Center
  • Partnerships

About

  • About Vocapedia
  • Contact Us
  • Feedback

Legal

  • Terms of Use
  • Privacy Policy
  • Cookie Policy
  • Accessibility
  • GDPR Compliance
© 2026 Vocapedia. All rights reserved.
  1. Home /
  2. Dictionaries /
  3. 和英辞典 /
  4. 確実な

確実な

kakujitsu na

What does "確実な" mean in English?

certain, reliable, sure

この方法は確実な方法です。

This is a certain method.


How to use "確実な" correctly: definitions and examples in English?

general

Certain, reliable, or sure; without doubt or uncertainty.

確実な情報を得るために、複数の情報源を確認した。

To obtain reliable information, I checked multiple sources.

彼は確実な勝ちを収めた。

He secured a certain victory.

Often used to describe something that is guaranteed or highly probable.

Collocations

確実な方法a certain method確実な情報reliable information確実な勝利a certain victory

Synonyms

確かな確定的な確信的な

Antonyms

不確かな不確実な疑わしい

Related Phrases

確実にadverb
certainly, surely

Pro Tip

Usage in Formal Contexts

In formal contexts, 確実な is often used to describe methods, information, or outcomes that are guaranteed or highly probable.

Gold Rule

Certainty Emphasis

Use 確実な when you want to emphasize the certainty or reliability of something.

Word Origin

From 確 (kakujitsu, meaning 'certain') + 実 (jitsu, meaning 'real').

Usage Notes

This adjective is commonly used in both formal and informal contexts to describe something that is certain or reliable. It can be used to describe methods, information, outcomes, or any situation where certainty is emphasized.

Word Breakdown

確
certain
root
+
実
real
root
+
な
adjectival suffix
suffix
和英辞典
Browse more Japanese→English words →

Learning Progress

Track your learning journey!

• Save words to build your vocabulary

• Monitor your daily streak

• Get personalized review reminders

• See words learned statistics

Log in to access advanced features and track your progress!

Go to Dashboard →

Words of the Year

The most notable words that defined each year. Discover the vocabulary that shaped our world.