flintiness in a sentence

Definition

Flintiness refers to the quality of being hard, tough, or unyielding in character or substance.

Her flintiness in negotiations often caught her opponents off guard.
The flintiness of the rock made it ideal for starting fires in the wilderness.
Despite her flintiness, she had a soft spot for her friends and family.
His flintiness was a double-edged sword, earning him respect but also isolation.
The flintiness of the atmosphere during the debate heightened the tension in the room.