What does it mean word for word?
The phrase is composed of yoku, meaning "well" or "often" and wakaranai, meaning "do not understand". Together, they literally mean "I don't understand well".
Which one should you use?
The default form よくわからない expresses a lack of understanding. In casual spoken Japanese, you may encounter the colloquial contraction よくわかんない, where the na sound is replaced by n.
Is there a formal and an informal way to say it?
よくわからない is a casual form suitable for use with friends or family. For a polite way to express that you do not understand or do not know, use 分かりません. For a very formal way to convey a high level of uncertainty or an inability to provide an answer, use わかりかねます. In casual settings, you can also simply use わからない.
Is it said differently in some regions?
The variation わからん is used in some regional dialects or in very casual speech.
How do you pronounce it?
yoku wakaranai
Did you know?
- When saying よくわからない, Japanese speakers often tilt their head slightly to the side to visually signal their confusion or uncertainty.
- If you use the polite version 分かりません to answer a request for a favor, it can sound quite blunt. To be more socially graceful and signal your uncertainty without being rude, Japanese speakers often add ちょっと ('a little') to soften the blow.
- In many Japanese conversations, a person might say よくわからない even when they actually know the answer, simply to remain humble or avoid appearing overconfident.
Examples in context
- どうすればいいのか、よくわからないんだ。I'm not sure what I should do.This sentence is useful for expressing uncertainty about what one should do using よくわからない.Tatoeba #9086024 by bunbuku, translation #1230878 by CK
- よくわからないけど、銃声みたいだったよ。I'm not sure what it was, but it sounded like a gunshot.This sentence is useful for expressing uncertainty about a sound using よくわからない.Tatoeba #10698738 by small_snow, translation #1923440 by CK
- トムが何をするつもりなのかよくわからない。I'm not sure what Tom will do.This sentence is useful for expressing uncertainty about someone's intentions using よくわからない.Tatoeba #2155984 by bunbuku, translation #1853728 by CK
- 4 more sentences on Tatoeba
Example conversation
Misaki and Ren are looking at a confusing map together.
- 美咲 Misakiここがどこなのか、よくわからない。Koko ga doko na no ka, yoku wakaranai.I'm not sure where we are.
- 蓮 Ren僕もだよ。道を間違えたかな。Boku mo dayo. Michi o machigaeta kana.Me too. I wonder if we took a wrong turn.
- 美咲 Misaki右か左か、どっちに行けばいいんだろう。Migi ka hidari ka, docchi ni ikeba iindaro.I wonder if we should go right or left.
- 蓮 Ren誰かに聞いてみようか。Dareka ni kiite miyō ka.Shall we ask someone?
Sources
- Example sentences: Tatoeba CC BY 2.0 FR.
