the.com/exertion
Energy spent loudly enough that everyone nearby knows you worked for it.
means The act of applying serious physical or mental effort toward some demanding task.
from From Latin exsertus, to thrust out or stretch forth — effort literally pushed into the open from within.
Body costPerceived exertion is rated on a 6-to-20 scale clinically.
Two flavorsMental exertion fatigues you despite zero physical movement.
Word cousinShares roots with insert and exert pressure.