sturdiness          
noun [ U ] uk/ˈstɜː.di.nəs/ us/ˈstɝː.di.nəs/
 结实,牢固;强壮
the quality of being physically strong and solid or thick, and therefore unlikely to break or be hurt
  Their canoes were noted for their sturdiness.  他们的独木舟结实牢固,非常有名。 
 the soft sturdiness of a growing child's limbs 正在成长中的孩童柔软结实的四肢 
  literary强壮,结实;刚强,坚毅 
the quality of being strong and determined
  Collingwood played with typical sturdiness. (澳洲)科林伍德橄榄球队以典型的强力风格打球。 
 She is the very image of mental sturdiness. 她代表了刚强的精神。 
 - More examples
 - We will spend whatever it takes to ensure the sturdiness of the state's bridges.
 - She relies on her physical sturdiness to stay healthy.
 - There's a quiet sturdiness about his actions.
 - It is a testimony to the sturdiness of their respective characters that the relationship works so well.
 
See: sturdy