someone who appears harmless but is actually dangerous
無害に見えて実際は危険な人 (mugai ni miete jissai wa kiken na hito)
"He was a wolf in sheep's clothing."
"彼は羊の皮をかぶった狼だった。" (kare wa hitsuji no kawa o kabutta okami datta)
to spread gradually among people
to lose energy or enthusiasm
far more advanced than others
to become very tired and lose motivation due to overwork
According to my understanding or opinion
able to understand things quickly
