根据所给的释义,拼写下列英语单词
1.something that is wrong or done in the wrong way
m_________
2.to be unsuccessful in something that you want to do
f__________
3.a way of solving a problem or dealing with a difficult situation
s________
4.something new or difficult that tests strength,skill or ability
c__________
5.to make the sound of a letter,word etc
p________
6.to be unable to remember facts,information or something that happend in the past
f________