What is the difference between "むずかしい", "困難な", "〜にくい", "槐門棘路"?

"むずかしい" means "difficult", "困難な" means "difficult, hard, challenging", "〜にくい" means "difficult to do; hard to do", "槐門棘路" means "the difficult path to high public office".

Quadruple VS

Synonym Boundary: "むずかしい", "困難な", "〜にくい", "槐門棘路"

All represent the core concept "difficult", but require precise selection.

Japanese Option A

むずかしい

むずかしい (muzukashii)

N5 / CEFR

Japanese Option B

困難な

こんなんな (konnan na)

N3 / CEFR

Japanese Option C

〜にくい

〜にくい (nikui)

N3 / CEFR

Japanese Option D

槐門棘路

かいもんきょくろ (kaimonkyokuro)

C2 / CEFR

Quadruple VS Nuance Contrast & Social Differences

When expressing "difficult" in Japanese, you must carefully distinguish between "むずかしい", "困難な", "〜にくい", "槐門棘路" based on context.

むずかしい (むずかしい (muzukashii) - Level: N5): Maps to "difficult" and is used when An i-adjective used to describe something that is not easy to do or understand. The opposite of やさしい.
困難な (こんなんな (konnan na) - Level: N3): Maps to "difficult, hard, challenging" and is used when Used to describe situations or tasks that are difficult to achieve or overcome. More formal than 「難しい.
〜にくい (〜にくい (nikui) - Level: N3): Maps to "difficult to do; hard to do" and is used when Indicates that an action is difficult to perform or that something is unlikely to occur. It is attached to the masu-stem.
槐門棘路 (かいもんきょくろ (kaimonkyokuro) - Level: C2): Maps to "the difficult path to high public office" and is used when Essential structural term in CEFR C2 vocabulary syllabus..

Mixing these up can easily lead to unnatural translations. Refer to the bilingual context cards below to master the boundaries!

Context for "むずかしい"

この問題はとても難しくて、わかりません。

This problem is very difficult, so I don't understand it.

Context for "困難な"

そのプロジェクトは非常に困難な課題を含んでいました。

That project involved very difficult challenges.

Context for "〜にくい"

この字は小さくて読みにくい。

This writing is too small and hard to read.

Context for "槐門棘路"

私は槐門棘路に興味があります。

I am interested in the difficult path to high public office.

Synonym Mastery Challenge

Which Japanese word perfectly fits this blank space?

Fill in the blank: "この問題はとても難しくて、わかりません。" (Meaning: "This problem is very difficult, so I don't understand it.")

🎉 Correct Answer!

Remember: "むずかしい" is correct here because it represents "difficult" in the context: "This problem is very difficult, so I don't understand it.".