tough

adjective

1
feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad')
my throat feels bad
she felt bad all over
2
substantially made or constructed
sturdy steel shelves
sturdy canvas
3
making great mental demands; hard to comprehend or solve or believe
a baffling problem
I faced the knotty problem of what to have for breakfast
4
very difficult; severely testing stamina or resolution
a rugged competitive examination
the rugged conditions of frontier life
5
unfortunate or hard to bear
had hard luck
a tough break
6
resistant to cutting or chewing
7
physically toughened
the tough bottoms of his feet
8
not given to gentleness or sentimentality
a tough character
9
violent and lawless
the more ruffianly element
tough street gangs

1
a cruel and brutal fellow
2
an aggressive and violent young criminal
3
someone who learned to fight in the streets rather than being formally trained in the sport of boxing

Also useful for “tough”:Wordle Solver— Five letters — perfect Wordle material