to gradually work on something to achieve a result
結果を得るために何かに徐々に取り組む (kekka o eru tame ni nanika ni jojoni torikumu)
"She chipped away at her thesis every evening until it was finished."
"彼女は毎晩徐々に彼女の論文に取り組み、終わらせた。" (Kanojo wa maiban **jyojyo ni** kanojo no ronbun ni torikumi, owaraseta.)
To relax and not worry too much.
the final problem that makes a situation unbearable
Small details are often the most important or problematic.
to manage an organization or group efficiently and strictly
to take a foolish risk that may bring bad luck
the least reliable or secure part of a system or group
