It was silly
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on of my collegues is about to leave.
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outline:
    this topic is mainly talk about insult sb,and the opposite is compliment
brave:  fearless ,courage
cowardly:
cruel:
    MMA , mixed martial arts. it contains a lot violent.
    sb like to do cruel things to others.
wicked: similar to cruel,
    it is very wicked of the boy to tease the girl.
silly
foolish
stupid
idiotic
        we will make some silly mistake at work.
generous
mean
    eg: my boss often said some means word to his employees.
         one of my friends is a mean person, may be his intention was good, he just want to ask to hurry up or other, 
     but he don't know how to express in a proper way.
selfish:
    child is a little selfish when they are small.
fair
    equal,
    the judge must be fair to everyone in the court.
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grammar focus
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to describe your feelings about someone or a situation,you can use the following construction.
it+be+adjective + (of +object)+ infinitive
it was selfish of you to eat the last piece of cake.
it will(definit)/would(posibility or hypethetical situation)  adj of sb to do sth.
      you could say someone "thinks the world revolves around him or her" if this person
is very conceited or selfish.

I hope my future wife should have a sense of humor.

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discussion
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people in the west sometimes see Asians being reserved with their emotions,while they themselves 
display what they feel very openly.