What does 聡い mean?
聡い is a Japanese noun meaning “smart” in English. It is written as 聡い in kanji, さとい in hiragana, and satoi in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
兄に比べれば、彼はそれほど聡明ではない。
Compared with his brother, he is not so intelligent.