日复一日

• Pinyin: rì fù yī rì
• Hanzi breakdown: 日 = sun/day; 复 = 夂 + 冂 + 口 (return repeatedly); 一 = one; 日 = day

Meaning

Day after day; day by day. Describes the repetitive passing of time, often with a sense of monotony or persistent effort.

Can carry either a negative connotation (tedious repetition) or a positive one (steadfast dedication). Often used to describe long-term routines or habits. Frequently paired in parallel structure: 日复一日，年复一年 (day after day, year after year) to emphasise the relentlessness of time.

Examples

1. 他日复一日地在实验室里进行枯燥的实验，终于取得了突破性成果。 Day after day, he ran tedious experiments in the lab and finally achieved a breakthrough.
2. 日复一日的机械劳动使他逐渐失去了对工作的热情与方向感。 Day after day of repetitive manual work gradually made him lose his passion for the job and his sense of direction.
3. 她日复一日地坚持训练，终于在全国比赛中脱颖而出。 She stuck with training day after day and finally stood out in the national competition.

Usage Guide

Context: literature, personal narrative, work

Tone: neutral

Do Say

• 科研人员日复一日地进行实验，才有了今天这些令人振奋的成果。(Researchers conducted experiments day after day, leading to today's exciting achievements.)
• 日复一日的坚持，是成功最朴素也最有力的保证。(Persisting day after day is the most simple yet powerful guarantee of success.)

Don't Say

• 他日复一日地很快乐 — 日复一日 modifies verbs and actions, not states of being; use 他每天都很快乐 instead

Origin & History

日 (day) + 复 (again/repeat) + 一日 (one day) — each day repeating the one before

Cultural Context

Generation: All ages

Social background: Universal