The mail carrier delivers our letters in all weather.
Tips
history
From Feng Menglong's Ming-dynasty story collection 《醒世恒言》 volume 30-something: 黄秀才从陆路短船,风雨无阻 — Scholar Huang traveled by land and short boat, undeterred by wind or rain. It has described dogged reliability ever since.
usage
Commonly placed before a verb with 地 (风雨无阻地坚持), or used as a standalone promise (比赛风雨无阻). Strongly positive, suggests reliability and commitment.