杯 水 車 薪 bēi shuǐ chē xīn : trying to put out a burning cartload of faggots with a cup of water - an utterly inadequate measure

不 夠 bù gòu : not enough; insufficient; inadequate

不 適 當 bù shì dàng : inadequate; unfit

不 宜 bù yí : not suitable; inadvisable; inappropriate

不 足 bù zú : insufficient; lacking; deficiency; not enough; inadequate; not worth; cannot; should

無 意 wú yì : inadvertent; accidental