to reveal something secret unintentionally
うっかり秘密を漏らす (ukkari himitsu o morasu)
"Don’t let on that you know about the plan."
"計画について知っていることを言わないでください。" (keikaku ni tsuite shitte iru koto o iwanai de kudasai)
a small part of a larger situation or problem
to make every possible effort to achieve something
to cause someone to have a new thought or idea
to surrender or give up
to make a serious mistake or spoil something
to praise oneself; to boast about one's achievements
