What are the opposite words for frailness?

Antonyms for the word "frailness" can be robustness, durability, strength, solidness, and vigour. Alternatively, sturdiness, toughness, and hardiness are also antonymic to frailness. These terms illustrate the opposing qualities to frailness, which may be understood as being weak, delicate, or easily broken. If someone is frail, they may be vulnerable to injuries or illnesses. Consequently, antonyms such as durability, strength and robustness describe resilient human characteristics such as good health, toughness and ability to withstand external pressure. Antonyms for the word "frailness" help to highlight the importance of being strong and resilient to cope with life pressures.