1.
sturdy; robust; solidly built (of objects)
Describes things that are strong and unlikely to break — furniture, buildings, materials.
この机は頑丈だ。
This desk is sturdy.
頑丈な鍵をかけた。
I put on a sturdy lock.
この橋は百年以上前に作られたが、まだ頑丈だ。
This bridge was built over a hundred years ago, but it's still solid.
2.
tough; hardy; strong (of people or bodies)
Describes a person or body that is physically strong and resilient, not easily getting sick or injured.
祖父は体が頑丈だ。
My grandfather has a strong body.
頑丈な体に生まれた。
I was born with a hardy body.
彼は見た目は細いが、意外と頑丈で風邪もめったに引かない。
He looks thin, but he's surprisingly tough and rarely catches a cold.
Conveys solid, reliable strength — whether of objects or people. For objects, it implies the thing can withstand heavy use or force. For people, it implies a naturally strong constitution.
COMMON COLLOCATIONS:
- 頑丈な作り: sturdy construction
- 頑丈な体: strong body
- 頑丈な骨: strong bones
SIMILAR WORDS:
- 丈夫な: strong, durable (very close synonym; slightly more everyday)
- 頑強な: tough, unyielding (emphasizes stubbornness or resistance)
- 堅固な: firm, solid (more literary, often for fortifications)