Adjective

(head)

(tough)

Adjective

(er)

Strong and resilient; sturdy.

The tent, made of tough canvas, held up to many abuses.

(of food) Difficult to cut or chew.

To soften a tough cut of meat, the recipe suggested simmering it for hours.

Rugged or physically hardy.

Only a tough species will survive in the desert.

Stubborn.

He had a reputation as a tough negotiator.

(of weather etc) Harsh or severe.

Rowdy or rough.

A bunch of the tough boys from the wrong side of the tracks threatened him.

Difficult or demanding.

This is a tough crowd.

(material science) Undergoing plastic deformation before breaking.

Adjective

(en adjective)

Not the same; exhibiting a difference.

*

* 1971 , William S. Burroughs, , page 6

Enter the American tourist. He thinks of himself as a good guy but when he looks in the mirror to shave this good guy he has to admit that "well, other people are different from me and I don't really like them." This makes him feel guilty toward other people.

* {{quote-magazine, date=2013-07-19, author= Ian Sample

, volume=189, issue=6, page=34, magazine=(The Guardian Weekly) , title= Irregular bedtimes may affect children's brains , passage=Irregular bedtimes may disrupt healthy brain development in young children, according to a study of intelligence and sleeping habits.  ¶ Going to bed at a different time each night affected girls more than boys, but both fared worse on mental tasks than children who had a set bedtime, researchers found.}}

Various, assorted, diverse.

* 2006 , Delbert S. Elliott et al., Good Kids from Bad Neighborhoods: Successful Development in Social Context , Cambridge University Press, ISBN 9780521863575, page 19:

In any case, poor black respondents living in high-poverty neighborhoods are most likely to view their neighborhood as a single block or block group and to use this definition consistently when asked about different neighborhood characteristics and activities.

Distinct, separate; (used for emphasis after numbers and other determiners of quantity).

* {{quote-magazine, year=2013, month=May-June, author= Charles T. Ambrose

, title= Alzheimer’s Disease , volume=101, issue=3, page=200, magazine=(American Scientist) , passage=Similar studies of rats have employed four different intracranial resorbable, slow sustained release systems—surgical foam, a thermal gel depot, a microcapsule or biodegradable polymer beads.}}

Unlike most others; unusual.