What is 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 called?

inertion — 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. (Webster's 1913.)