It is impossible to get something from someone if they don't have it, just as you cannot get blood from a turnip.
Fall off the turnip truck
(USA) If someone has just fallen off the turnip truck, they are uninformed, naive and gullible. (Often used in the negative)
Squeeze blood out of a turnip
(USA) When people say that you can't squeeze blood out of a turnip, it means that you cannot get something from a person, especially money, that they don't have.
An turnip idiom dictionary is a great resource for writers, students, and anyone looking to expand their vocabulary. It contains a list of words with similar meanings with turnip, allowing users to choose the best word for their specific context.
類似の言葉の辞書、別の表現、同義語、イディオム イディオム turnip