va·cu·i·ty 
/væˈkju:wəti/ noun
/væˈkju:wəti/ noun [noncount] formal : the state of lacking any real meaning, importance, or intelligence
▪ We tired of the vacuity of their conversation. ▪ intellectual/moral vacuity [=emptiness]
▪ We tired of the vacuity of their conversation. ▪ intellectual/moral vacuity [=emptiness]
