With a grain of (আপত্তি সহকারে) We accepted their proposal with a grain of salt.
Well of (সচ্ছল) He is well off and can easily help the man.
White elephant (ব্যয় সাপেক্ষ, গরীবের হাতিপোষা) To hire you is a white elephant.
Wild goose chase (পন্ড্রশ্রম) I decided to give up my all wild goose chase
Worth one’s salt (যোগ্য) The salary I get is not worth my salt
Why and wherefore (কারণ) I do not know why and wherefore of his absence.