資料來源 : Webster's Revised Unabridged Dictionary (1913)

Inertion \In*er"tion\, n.
   Want of activity or exertion; inertness; quietude. [R.]

         These vicissitudes of exertion and inertion of the
         arterial system constitute the paroxysms of remittent
         fever.                                   --E. Darwin.