なるたけ
なるたけ · narutake · JLPT N1 · noun
possible
成る丈 = 成る (become) + 丈 (extent): as far as it can become, i.e. if possible
Often written 成る丈, from 成る (to become) and 丈 (extent, length). Literally 'to whatever extent it becomes', so it means 'as much as possible'.