What are the opposite words for robustness?

Antonyms for the word "robustness" are frailty, weakness, delicacy, vulnerability, and puniness. These words represent a lack of strength, durability or toughness. Fragility implies a susceptibility to break or shatter, while weakness signifies a lacking in strength and power. Delicacy connotes fragility combined with attractiveness, vulnerability denotes ease to be harmed, and puniness refers to a lack of physical strength. These words describe the opposite of robustness, which is the quality of being strong and resilient. In essence, antonyms for robustness signify unfavorable characteristics that are undesirable in various capacities.

Antonym of the day

let the cat ouf bag
be quiet, conceal, hide.