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

"むずかしい" means "difficult", "〜にくい" means "difficult to do; hard to do", "難航" means "difficult navigation, rough passage; making slow progress, encountering difficulties (of negotiations, projects)", "槐門棘路" means "the difficult path to high public office".

Quadruple VS

Synonym Boundary: "むずかしい", "〜にくい", "難航", "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

〜にくい

〜にくい (nikui)

N3 / CEFR

Japanese Option C

難航

なんこう (nankou)

N1 / 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", "〜にくい", "難航", "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.
〜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.
難航 (なんこう (nankou) - Level: N1): Maps to "difficult navigation, rough passage; making slow progress, encountering difficulties (of negotiations, projects)" and is used when Literally meaning 'difficult navigation' for ships, it is commonly used metaphorically for projects, negotiations, or processes that are making slow or difficult progress due to various obstacles and challenges..
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 "〜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 "難航"

交渉は予想通り難航している。

The negotiations are facing difficulties as expected.

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.".