to progress or improve very quickly
非常に速く進歩または改善する (hijō ni hayaku shinpo mata wa kaizen suru)
"Her English has improved by leaps and bounds."
"彼女の英語は急速に改善されました。" (kanojo no eigo wa bai rīpusu ando baundosu de shinpo shimashita)
to make someone happy
To be completely truthful or sincere.
to fall deeply in love
a family secret that one wants to keep hidden
something that operates smoothly and efficiently
to work hard on something for a long period
