noun (n)

• the state of being vigorous and robust

  keadaan menjadi gagah dan tegap

  source: wordnet30
• the property of something that is strongly built

  milik sesuatu yang kukuh

  source: wordnet30
• resoluteness evidenced by strength of character

  ketegasan evidenced oleh kekuatan karakter

  Example:
  Sturdiness of moral principle.
  

  source: wordnet30
• Quality of being sturdy.

  kualitas yang kokoh.

  source: webster1913