tough

1 tough /ˈtʌf/ adjective
tougher; toughest
1 tough
/ˈtʌf/
adjective
tougher; toughest
Britannica Dictionary definition of TOUGH
1 
: very difficult to do or deal with
— often followed by to + verb
2 
a  : physically and emotionally strong : able to do hard work, to deal with harsh conditions, etc.
b  : physically strong and violent
3 
a  : strong and not easily broken or damaged
4 
: very strict
5 
: having a lot of crime or danger
6 
: hard to influence or persuade
7 
informal : unfortunate in a way that seems unfair — often used in an ironic way to show that you do not feel sympathy for someone
— see also tough luck at 1luck

(as) tough as nails

— see 1nail

(as) tough as old boots

British, informal
: very tough

a tough act to follow

— see follow

a tough nut (to crack)

— see nut

a tough row to hoe

— see 1row

hang tough

— see 1hang

— toughly

adverb

— toughness

noun [noncount]
2 tough /ˈtʌf/ verb
toughs; toughed; toughing
2 tough
/ˈtʌf/
verb
toughs; toughed; toughing
Britannica Dictionary definition of TOUGH

tough it out

informal
: to deal with a difficult situation by being determined and refusing to quit
3 tough /ˈtʌf/ noun
plural toughs
3 tough
/ˈtʌf/
noun
plural toughs
Britannica Dictionary definition of TOUGH
[count] informal + old-fashioned
4 tough /ˈtʌf/ adverb
4 tough
/ˈtʌf/
adverb
Britannica Dictionary definition of TOUGH
: in a way that shows that you are strong or tough