| Expression | Reading | Meaning |
|---|---|---|
| 難しい | muzukashii | Difficult / hard / complex |
| 難しそう | muzukashisou | Looks difficult / seems hard |
| 難しくない | muzukashikunai | Not difficult / not hard |
| 難易度が高い | nani-ido ga takai | High difficulty level (formal) |
難しい seems like one of those words everyone knows, but I sometimes hear むずかしい instead. Is that different?


Same word! むずかしい is just a casual pronunciation variant of むずかしい. Both are standard — you’ll hear both in natural speech. The kanji 難しい is the formal written form.
What Does 難しい (muzukashii) Mean?
難しい is an i-adjective meaning difficult, hard, or complex. It is one of the most commonly used adjectives in Japanese and applies to tasks, subjects, situations, and abstract concepts.
- この問題は難しい。 — This problem is difficult.
- 日本語の漢字は難しい。 — Japanese kanji is difficult.
- 難しい質問ですね。 — That’s a difficult question.
- 難しく考えないで。 — Don’t overthink it / don’t make it complicated.
難しい vs Related Expressions
| Expression | Meaning | Nuance |
|---|---|---|
| 難しい | Difficult | General; intellectual or practical difficulty |
| 大変 (taihen) | Hard / tough / exhausting | Emphasizes physical or emotional difficulty |
| 複雑 (fukuzatsu) | Complex / complicated | Multiple intertwined elements |
| 無理 (muri) | Impossible / can’t | Beyond ability or possibility |
| 手強い (tegowai) | Tough / formidable | A tough opponent or challenge |


What’s the difference between 難しい and 大変?


難しい is about mental or skill difficulty — “this problem is hard to understand.” 大変 is about the burden or effort involved — “this situation is tough / a lot of work.” A task can be 大変 (exhausting) without being 難しい (complicated).
Useful Patterns
- 難しすぎる — Too difficult
- 難しくなってきた — It’s getting harder
- 難しいけど面白い — Difficult but interesting
- 難しく考えすぎ — Overthinking it / making it too complicated
- 難しい顔をする — To make a serious/troubled face
Quick Quiz
Translate or choose:
- 1. This exam is really difficult. — この試験は本当に___。
- 2. Don’t make it so complicated! — そんなに___く考えないで!
- 3. It looks difficult but let’s try. — ___そうだけどやってみよう。
Answers: 1. 難しい 2. 難し 3. 難しい
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Summary
| Expression | Best use |
|---|---|
| 難しい | Intellectual/skill difficulty — most versatile |
| 大変 | Tough, exhausting, burdensome |
| 複雑 | Complex with many elements |
| 無理 | Impossible / can’t do it |




