to know someone very well
誰かをよく知っている (dareka wo yoku shitteiru)
"I know her inside out; we’ve been friends for years."
"私は彼女をよく知っています; 私たちは何年も友達です。" (Watashi wa kanojo wo yoku shitteimasu; watashitachi wa nannen mo tomodachi desu.)
to say something embarrassing or inappropriate
not very intelligent; not a genius
don’t rush; use as much time as needed
to settle and become established somewhere
a very small difference between two things
to solve a problem through programming skills