- 1. superl. Having the quality of flexibility without brittleness; yielding to force without breaking; capable of resisting great strain; as, the ligaments of animals are remarkably tough. Source: opted
- 2. superl. Not easily broken; able to endure hardship; firm; strong; as, tough sinews. Source: opted
- 3. superl. Not easily separated; viscous; clammy; tenacious; as, tough phlegm. Source: opted
- 4. superl. Stiff; rigid; not flexible; stubborn; as, a tough bow. Source: opted
- 5. superl. Severe; violent; as, a tough storm. Source: opted
- 6. adj. not given to gentleness or sentimentality Source: wordnet
- 7. adj. very difficult; severely testing stamina or resolution Source: wordnet
- 8. adj. physically toughened Source: wordnet
- 9. adj. substantially made or constructed Source: wordnet
- 10. adj. violent and lawless Source: wordnet
- 11. adj. feeling physical discomfort or pain (‘tough’ is occasionally used colloquially for ‘bad’) Source: wordnet
- 12. adj. resistant to cutting or chewing Source: wordnet
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