“不适当”怎么读

对老人粗鲁是不适当的.To be rude to the old is not proper.他想对他的同事施加不适当的影响.He tried to exercise an undue influence upon his colleagues.她在最不适当的时候说出实话.She plumps out the truth at the oddest times....

“不适当”的英语可以翻译为：inadequacy，impropriety，inaptitude，ineptitude，insufficiency ...