also: じっしん
noun
day-by-day renewal; rapid progress
Obsolete term referring to continuous daily improvement or swift advancement. Found in classical or historical texts.
「日新」は、日々新たになることを意味する古い言葉だ。
日新 is an old word meaning to be renewed day by day.
A common modern idiom meaning steady progress, while 日新 is an obsolete standalone noun.
The exact derivation is uncertain; the spelling combines 日 (day) and 新 (new), suggesting the idea of daily renewal.