METTLE - sounds like 'MEET' + 'HELL' To MEET HELL one should have the COURAGE TO CARRY ON
Reminds of Steel King industrialist Lakshmi Mittal: Symbolic of courage to carry on
We use Metal for waging war. Implying courage
meet(guys lets meet up,we all will be a force then)+all(Unity is strength and seems courageous)
in the military they give you a metal for brave deeds
METTLE= MEnTaL courage and spirit....
MET(meat)+LE(in hindi le means take)....people who sell meat say MEAT LE....but they require COURAGE to carry on the business because everytime they have to kill innocent animals
it takes mettle to walk through a field of nettle