一いち日にち一いち日にち

adverb, adverb taking the 'to' particle

gradually; day by day

Describes a slow, steady change or progress happening each day. Often used with verbs of change like 変わる, 増える, 成長する.

• 春はるが近ちかづき、一いち日にち一いち日にちと暖あたたかくなってきた。

  As spring approaches, it's getting warmer day by day.

• 彼かれの病びょう状じょうは一いち日にち一いち日にちと回かい復ふくに向むかっている。

  His condition is improving gradually, day by day.

noun

every day; each day

Refers to each individual day as a unit, often in contexts of daily effort, routine, or counting days. More concrete than the adverbial sense.

• 一いち日にち一いち日にちを大たい切せつに生いきたい。

  I want to live each day to the fullest.

• 試し験けんまで一いち日にち一いち日にちが貴き重ちょうだ。

  Every day is precious until the exam.