sturdy
adjective
having rugged physical strength; inured to fatigue or hardships
“hardy explorers of northern Canada”
“proud of her tall stalwart son”
not making concessions
“took an uncompromising stance in the peace talks”
“uncompromising honesty”
substantially made or constructed
“sturdy steel shelves”
“sturdy canvas”
Synonymstough
Source: WordNet 3.1, Princeton University
