What does 勘違い mean?
勘違い is a Japanese adjective meaning “misunderstanding, wrong guess” in English. It is written as 勘違い in kanji, かんちがい in hiragana, and kanchigai in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
彼はクラスで一番頭がいいと勘違いしている。
He has the illusion that he is the smartest in his class.