mean 

1.He seems rather mean, but he is kind at heart.

2.This man is very mean.

active 

1.Although he's nearly 80, he is still very active.

2.He has been an active participant in the discussion.

generous 

1.They are very generous.

2.He is generous with his time and money.

self 

1.You're not your usual cheerful self today.

2.You're looking more like your usual self.

selfish 

1.He's too selfish to think of lending me his car.

2.You must learn to share and not be so selfish.

selfless 

1.The working class is most selfless.

2.His selfless spirit is revealed in everything he does.

selflessly 

1.They selflessly gave their all to the great cause of education.

2.He acted selflessly when he helped the old lady in distress.

devote 

1.After her marriage, she couldn't devote herself totally to her music.

2.He want to devote his life to science.

devoted 

1.They are devoted to their children.

2.I found a devoted friend.

found  

1.They eventually found a new home.

2.His father founded the American Socialist Party.

republic 

1.The People's Republic of China was founded in 1949.

2.Switzerland is a federal republic.

principle 

1.They are agreed in principle but not in detail.

2.These people lack all understanding of scientific principles.   

peaceful 

1.She wants a peaceful life.

2.She spent a peaceful afternoon reading a novel.

mankind 

1.Today, mankind needs and cares only for technology.

2.He has been devoting his whole life to benefiting mankind.

lawyer 

1.She is a lawyer.

2.The lawyer produced a clever defense of his client.

guidance 

1.Under his father's guidance, he learned how to swim.

2.Could you give us some guidance in studying this article?

legal 

1.Your only recourse is legal action.

2.What I did was legal.