to do something secretly or deceitfully against someone
誰かに対して秘密裏に、または不正に何かをする
"She went behind my back and told the manager everything."
"彼女は私の背後でマネージャーに全てを話した。"
Things are usually worst just before they improve.
to have too much work to do
A widely accepted truth or belief.
someone who spoils the fun of others
to be very eager or impatient for something to happen
to make a great effort to help or please someone
