to do something secretly without their knowledge
彼らが知らないうちに何かをする (karera ga shiranai uchi ni nanika o suru)
"She was talking about me behind my back."
"彼女は私の背中の後ろで私について話していた。" (Kanojo wa **watashi no senaka no ushiro de** watashi ni tsuite hanashite ita.)
the skill of doing something well
a period or stage in someone’s life
To be extremely anxious or tense.
To be proud and confident even after failure or hardship.
to go shopping for a long time until you are tired
extremely jealous
