the.com/rigidity
The principled refusal to bend, right up until something snaps.
means Stiffness — the quality of being unable or unwilling to bend, flex, or change.
from From Latin rigidus, stiff or unbending, rooted in rigere, to be numb with cold — the body frozen solid, now the mind frozen too.
PhysicsMeasured as resistance to deformation under force.
BiologyRigor mortis is rigidity death takes seriously.
PsychologyCognitive rigidity resists new ideas like glue.