na-adjective, noun
robust; sturdy; strong and healthy
Describes a person's physical constitution, health, or the sturdiness of an object. Often used for someone who rarely gets sick or for durable things.
彼は頑健な体の持ち主だ。
He has a robust physique.
この机は頑健で、長く使える。
This desk is sturdy and will last a long time.