inert - definition and synonyms

adjective 

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/ɪˈnɜː(r)t/
  1. 1
    someone who is inert does nothing when they should be taking action
  2. 2
    chemistry an inert substance does not produce a chemical reaction when it is mixed with other substances

    an inert gas

  3. 3
    not moving
     Synonyms and related words