to work hard on something for a long period
何かに長時間一生懸命働く (nanika ni chō jikan isshōkenmei hataraku)
"She grinded away at her studies to pass the exam."
"彼女は試験に合格するために一生懸命勉強しました。" (kanojo wa shiken ni gōkaku suru tame ni isshōkenmei benkyō shimashita)
a person who acts as if they know everything
a positive aspect in a difficult situation
to protect your computer system or network from attacks
in a hostile or dangerous situation
to experience the same unpleasantness you caused to others
enjoying yourself greatly
