The word "矫健" is formed by combining the character "矫", which carries meanings related to straightening, strengthening, or agility, with the character "健", which signifies health, strength, or vigor. Together, these characters semantically contribute to describe a quality of being physically robust and nimble, with "矫" emphasizing upright or agile aspects and "健" emphasizing vigorous strength, resulting in a compound word that denotes athletic prowess or brisk vitality.