Severe; violent; as, a tough storm.

Prone to aggressive or violent behavior; rowdyish; -- of people, or groups; as, a tough neighborhood; a tough character.

A person who is tough{7}; a ruffian; a thug; as, a cluster of neighborhood toughs hanging out on the corner.

someone who learned to fight in the streets rather than being formally trained in the sport of boxing

a red wine that has excessive tannin.

Roughly textured, often as a result of too much tannin.

Usually implying too much tannin

Found in red wines with a high tannin content.

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.

Stiff; rigid; not flexible; stubborn; as, a tough bow.

unfortunate or hard to bear; "had hard luck"; "a tough break"

Difficult to do, perform, or accomplish; as, a tough job.

difficult to break, tear or cut

very difficult; severely testing stamina or resolution; "a rugged competitive examination"; "the rugged conditions of frontier life"; "the competition was tough"; "it's a tough life"; "it was a tough job"

describes red wine that is excessively tannic; astringent or hard.

too tannic

Astringent or hard; wiry; tannic.