to keep one's plans or ideas secret
自分の計画やアイデアを秘密にする (jibun no keikaku ya aidea o himitsu ni suru)
"He always plays his cards close to his chest in business."
"彼は常にビジネスでカードを胸に近づけてプレイする" (kare wa jōni bijinesu de **kādo o mune ni chikadzu kute purei suru**)
to gradually build courage, energy, or an appetite
to betray or sacrifice someone to save yourself
to complete a form by providing information
Always continue trying despite difficulties.
to have a really good time
legal protection given to diplomats from prosecution
