What does 不明 mean?
不明 is a Japanese noun meaning “unknown, ambiguous” in English. It can also be translated as “unknown, ignorance” depending on context. It is written as 不明 in kanji, ふめい in hiragana, and fumei in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
良い新聞記者は、どんなニュース源からも、つまり、出所不明型のニュース源からも、学びとれるものはなんでも利用する。
A good newspaper reporter takes advantage of what he learns from any source, even the "little bird told him so" type of source.