(someone's) secret is safe with (one) イディオム
set (one) back
cost How much did your new suit set you back?
give (one) up for|give|give one up for|give up|giv
v. phr. To abandon hope for someone or something.
After Larry had not returned to base camp for three nights, his fellow mountain climbers gave him up for dead.
keep (one) posted|keep one posted|keep posted
v. phr. To receive current information; inform oneself.
My associates phoned me every day and kept me posted on new developments in our business.(someone's) abstruse is safe with (one)
One will not admit the abstruse that addition abroad has aggregate with one. A: "Please don't allotment that advice with anyone else!" B: "Don't worry—your abstruse is safe with me!" The acknowledged adviser assured me that our secrets are safe with him.Learn more: safe, secretYour abstruse is safe with me.
I will not acquaint your abstruse to anyone. Don't worry. I won't tell. Your secret's safe with me. Your abstruse is safe with me. I will backpack it to my grave.Learn more: safe, secret