xū​bù​shòu​bǔ

too weak for tonics

  1. adjective
    weak
    (of health) weak; deficient; in poor health; lacking in vital energy
  2. bu particle
    [potential]
    Used between a verb and its result to show that the action cannot achieve that result; used as the negative form of the de potential construction
  3. to endure
    To bear, endure, or stand; to contain or accommodate
  4. to nourish
    to take or give tonic or nutritious food to strengthen the body