Describes a person's attitude or will that does not give up easily; often used for persistent effort or resistance.
He fought the serious illness with a tenacious will.
その政治家は頑強に自説を主張した。
The politician stubbornly insisted on his own opinion.
Describes physical toughness, durability, or robustness of objects, bodies, or systems.
この靴は頑強で、何年も履ける。
These shoes are sturdy and can be worn for years.
頑強な体を作るために毎日運動している。
I exercise every day to build a strong body.
He stubbornly resisted the police interrogation.
He is a wrestler famous for his tough physique.
The residents stubbornly opposed the plan.
This bridge is known for its sturdy structure.