虛不受補

a person who is in poor health cannot handle sth so strong as a tonic

no; not so / (bound form) not; un-

to receive / to accept / to suffer / subjected to / to bear / to stand / pleasant / (passive marker)

emptiness / void / abstract theory or guiding principles / empty or unoccupied / diffident or timid / false / humble or modest / (of health) weak / virtual / in vain

to repair / to patch / to mend / to make up for / to fill (a vacancy) / to supplement