What does toughness mean?
Toughness is the capacity to endure physical strain, difficult conditions, or emotional pressure without being easily overcome or broken. In physical contexts, it describes the strength and resistance of a material, body, or organism: a protective shell may have greater toughness than a fragile one. In personal and competitive contexts, toughness more often means mental resilience—the determination to continue despite hardship, failure, pain, or intense pressure. The phrase “mental toughness” is especially common in education, sport, and professional development. Toughness can also indicate difficulty, as in the toughness of a contest or the demands of a journey. Unlike simple endurance, toughness often carries a connotation of strength under pressure: it suggests not merely continuing but resisting breakage. The word is valued in English because it condenses both physical resilience and the broader human capacity to persist when conditions are adverse.
nounThe quality of being strong enough to withstand physical strain, damage, or difficult conditions; it can also refer to mental resilience and the ability to endure hardship.
- The physical strength or resistance that enables a person, material, or organism to withstand strain, damage, wear, or harsh conditions.
- Mental resilience; the capacity to endure difficulty, disappointment, or pressure without losing resolve.
- The degree to which a task, challenge, competition, or situation is demanding or difficult.
"Her years in competitive sports gave her both physical toughness and the resolve to keep going when victory seemed uncertain."
"The toughness of the outer shell protects the delicate mechanism inside."
"Years of adversity tested her toughness and revealed a resilience she had not known she possessed."
"Competitors must be prepared for the toughness of the qualifying rounds."
Rarely used; normally, toughness is an uncountable noun. The plural may distinguish separate degrees or properties.
"The laboratory compared the toughnesses of the two composite materials."
Toughness traces back to the idea of food that is hard to chew—a surprisingly domestic beginning for a word now associated with grit.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does toughness come from?
Toughness was formed in English from Middle English tough and the productive suffix -ness, which creates nouns denoting a quality or state. The adjective tough has Old English ancestry, and the same root underlies modern forms such as toughen and toughly. Over time, the word's range expanded from physical resistance to metaphorical endurance of hardship and adversity.
How toughness is actually used
Toughness is normally uncountable. It is especially associated with physical endurance and, in modern usage, mental resilience. Plural forms are uncommon but can occur when distinct materials or properties are being compared.