To know something very well
何かを完全に知っている (nanika o kanzen ni shitteiru)
"She knows the syllabus inside out."
"彼女はシラバスを完全に知っている。" (kanojo wa shirabasu o kanzen ni shitteiru)
kept secret or very confidential
to be in direct competition or disagreement
to be supportive of someone
a person who is always busy and active
to get connected to the internet
something or someone that looks pitiful or regrettable
