imperviousness β not permitting penetration or passage; impenetrable: The coat is impervious to rain.
inelasticity β not elastic; lacking flexibility or resilience; unyielding.
resistance β the act or power of resisting, opposing, or withstanding.
rigidity β stiff or unyielding; not pliant or flexible; hard: a rigid strip of metal.
solidity β the state, property, or quality of being solid.
temper β a particular state of mind or feelings.
tensile strength β the resistance of a material to longitudinal stress, measured by the minimum amount of longitudinal stress required to rupture the material.
resolution β a formal expression of opinion or intention made, usually after voting, by a formal organization, a legislature, a club, or other group. Compare concurrent resolution, joint resolution.
resolve β to come to a definite or earnest decision about; determine (to do something): I have resolved that I shall live to the full.
determination β Determination is the quality that you show when you have decided to do something and you will not let anything stop you.
steadfastness β fixed in direction; steadily directed: a steadfast gaze.
constancy β Constancy is the quality of staying the same even though other things change.
decision β When you make a decision, you choose what should be done or which is the best of various possible actions.
fixity β the state or quality of being fixed; stability; permanence.
obduracy β the state or quality of being obdurate.
obstinacy β the quality or state of being obstinate; stubbornness.