What does 俄 mean?
俄 is a Japanese noun meaning “sudden, abrupt, unexpected” in English. It can also be translated as “bandwagon fan” depending on context. It is written as 俄 in kanji, にわか in hiragana, and niwaka in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
にわか仕込みの知識ではその問題は解けなかった。
Hastily acquired knowledge was not enough to solve the problem.