/tʌf/
[adjective] Strong and able to deal with difficult conditions or situations without breaking or giving up. It can also describe something that is hard to cut, chew, or damage, or a situation that is difficult and demanding.
The Old English word for 'tough' originally described the physical texture of rope — not strength of character at all.
The word 'tough' has roots that stretch back more than a thousand years into the Germanic languages. Its oldest known ancestor is the Old English word 'tōh', which was used to describe something that was physically hard to break or difficult to cut — think of leather, sinew, or twisted rope. This was a purely physical description, concerned with the texture and resistance of materials, not with human resilience or willpower. The word belonged to a family of Germanic terms all built around the idea of things that hold together stubbornly and refuse to come apart.
From Old English 'tōh', the word moved through the centuries as English itself transformed after the Norman Conquest. It gradually shifted in spelling through Middle English, appearing as 'tough' and 'tugh' in texts from the 13th and 14th centuries. The spelling settled into its modern form by the late medieval period, though the pronunciation changed as part of the Great Vowel Shift — a sweeping reorganisation of English vowel sounds that took place roughly between 1400 and 1700. This is why the 'ough' in 'tough' sounds like 'uff' rather than the 'oh' sound you might expect from its older form.
The Germanic family to which 'tough' belongs is ancient and wide. Its relatives include Old High German 'zāhi', meaning 'tenacious' or 'sticky', and Old Saxon 'tāhi', with similar meanings. Dutch 'taai' — still used today to mean 'tough' or 'chewy' — is a close cousin, as is German 'zäh', which carries the sense of something viscous, chewy, or stubbornly persistent. These words all trace back to a Proto-Germanic root reconstructed as *tanhwaz, a root tied to ideas of holding firm, resisting force, and clinging together.
For most of its early life in English, 'tough' was used in concrete, physical ways — tough meat was meat that was hard to chew, tough wood was wood that resisted an axe. The leap from describing materials to describing people came gradually. By the 16th and 17th centuries, English speakers were using 'tough' to describe people who were physically strong and hard to defeat. This was a natural extension: if leather is tough because it resists tearing, a person is tough because they resist hardship. The metaphor was so intuitive that it became invisible.
By the 19th century, the word had gathered new social meaning, especially in American English. A 'tough' as a noun — meaning a violent, rough person or street criminal — appeared in print during this period, and phrases like 'tough luck' and 'tough customer' became part of everyday speech. The word began to carry a certain admiration mixed with wariness, suggesting not just physical durability but a refusal to be softened by circumstances. In the 20th century, expressions like 'tough it out' and 'tough love' extended the word even further into the emotional and moral world. Today, 'tough' does an enormous amount of work in English — covering everything from overcooked steak to military training to a difficult conversation — all while remaining tied to that original Old English image of something that simply will not come apart.