tuff

/tʌf/

noun

1
A light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

1
Strong and resilient; sturdy.
“The tent, made of tough canvas, held up to many abuses.”
2
(of food) Difficult to cut or chew.
“To soften a tough cut of meat, the recipe suggested simmering it for hours.”
3
Rugged or physically hardy.
“Only a tough species will survive in the desert.”
4
Stubborn.
“He had a reputation as a tough negotiator.”
5
(of weather etc) Harsh or severe.
6
Rowdy or rough.
“A bunch of the tough boys from the wrong side of the tracks threatened him.”
7
(of questions, etc.) Difficult or demanding.
“This is a tough crowd.”
8
Undergoing plastic deformation before breaking.

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