無源之水,無本之木

wúyuánzhīshuǐwúběnzhīmù ㄨˊ ㄩㄢˊ ㄓ ㄕㄨㄟˇ ㄨˊ ㄅㄣˇ ㄓ ㄇㄨˋ

    • water without a source, a tree without roots
    • something without foundation

      figurative

Sources