The Collaborative International Dictionary
Inertion
Inertion \In*er"tion\, n. Lack 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.
Wiktionary
inertion
n. Want of activity or exertion; inertness; quietude.