Bimyo(微妙) has some meanings and it's hard to translate into English. I think it means iffy, subtle or delicate. an example: "新しいかばんどう思う？" "微妙..." <---> "What do you think this new bag?" "That's kind of iffy..." And yea, this answer is also iffy...

When the things that it's very hard to describe with a word,always use 'bimyo'. I think so.

"Bimyou" has several meanings. It means small, sensitive, fine, subtlety, etc. In case of sensitive, there is a sensitive issue between man and wife. (夫婦間に微妙な問題がある。) In case of small, the difference in Korean and Japanese are small from the point of view of European. (ヨーロッパ人から見ると、韓国人と日本人の違いは微妙です。)