real intention; true motive; true will
original intention; original purpose; original hope
辞めるのは私の本意ではない。
Quitting is not what I truly want.
彼はようやく友人に本意を打ち明けてくれた。
He finally confided his true intentions to his friend.
表向きは賛成したが、本意は全く違うところにある。
Outwardly he agreed, but his true intentions are in an entirely different place.