adjective

 

firm firm and stiff, and not easy to press or bend

a hard surface

 

difficult difficult to do or understand

It must be hard to study with all this noise.

 

with effort using or done with a lot of effort

the long, hard struggle

 

unpleasant full of problems and difficult to deal with

My grandparents had a very hard life.

 

not kind not gentle or kind

She had a cold, hard look in her eyes.

 

adverb

 

with effort with a lot of effort

She tried very hard but she wasn't quite fast enough.

 

with force with a lot of force

It's been raining hard all day.