속셈이 · 속셈을
hidden intention, ulterior motive; mental arithmetic
Example
그가 갑자기 친절한 데는 다른 속셈이 있는 것 같아요.
I think he has an ulterior motive for suddenly being so kind.
Word parts
속 'inside' + 셈 'calculation': the calculation you keep inside.
Good to know
Pronounced [속쎔]; 무슨 속셈이야? is a common suspicious question: 'What are you up to?'