What does 利口 mean?
利口 is a Japanese noun meaning “clever, shrewd, bright” in English. It can also be translated as “well-behaved (esp. of children and pets)” depending on context. It is written as 利口 in kanji, りこう in hiragana, and rikou in romaji. This word is part of JLPT N3 vocabulary.
Example sentence
しかし、トニーは利口な少年ではありませんでした。
But Tony was not a clever boy.