There was a moment in todays episode where Elliott mentions Inertia and subsequently forgets the definition. Here is a googled definition :
" 2. PHYSICS - a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
"the power required to overcome friction and the inertia of the moving parts"
Source: https://www.google.com/search q=definition+of+inertia&rlz=1C5CHFA_enUS935SE936&oq=defintion+of+interia&aqs=chrome.1.69i57j0i10l9.6419j0j4&sourceid=chrome&ie=UTF-8
