If something 'is very hard' it means it is solid - for instance if you take mud that is soft, while a slab of granite is very hard in comparison to the mud.
It can also be used to describe a person, someone who is very hard can be a muscular person who is strong and good in a fight or someone who is mentally brutal like a boss who fires staff without feeling for their situation is mentally very hard.
Thinking very hard
When you say someone is hard boiled you basically mean that he is very difficult to deal with.
a very hard specific thing to find like NOT POPULAR VERY HARD TO FIND -- VERY hard to find. Also a band from a popular Japanese anime :P
very pretty and work hard
very hard to explain ;)
I think you mean arduous. Arduous means very hard or difficult.
it means to work hard, very hard. so hard that you can be done by 12:00 AM.
very hard working and wise
A very amazing and talented person that is hard not to love.
Your question is very vague. What do you mean by hard?
This means when your car jerks very hard.
Hard truths mean that the truth that is hard to admit or if someone did something like, really really bad, it is very hard to say the truth :D glad i can kind of help yah! :D