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How to Say ‘Don't understand well’ in Japanese

よくわからない

yoku wakara nai

[yoh-koo wah-KAH-rah nai]

💬 Usage Tip: よく here means "well" or "clearly," not "often" as it does elsewhere. わからない is the casual "don't understand"; add です after it or switch to わかりません for a politer version.

🇯🇵 In Japan: Saying you didn't quite follow something, rather than guessing, is seen as responsible at a Japanese workplace. Pointing to よく "clearly" keeps it soft, suggesting you caught part of it.

Phrase Breakdown

よく

yoku

[yoh-koo]

well

To a high degree; thoroughly.

Example

よくできました。

Well done.

わから

wakara

[wah-KAH-rah]

understand (negative stem)

Form of わかる used before ない to make 'not understand'.

Example

意味がわからない。

I don't understand the meaning.

ない

nai

[nai]

not

Indicates negation or absence.

Example

問題はない。

There is no problem.

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