indispensableness

from WordNet (r) 3.0 (2006)
indispensableness
    n 1: the quality possessed by something that you cannot possibly
         do without [syn: {indispensability}, {indispensableness},
         {vitalness}] [ant: {dispensability}, {dispensableness}]
    
from The Collaborative International Dictionary of English v.0.48
Indispensableness \In`dis*pen"sa*ble*ness\, n.
   The state or quality of being indispensable, or absolutely
   necessary. --S. Clarke.
   [1913 Webster]
    

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