風雨無阻

regardless of weather conditions / rain, hail or shine

wind / news / style / custom / manner / CL:陣|阵[zhen4],絲|丝[si1]

wind and rain / the elements / (fig.) trials and hardships

rain / CL:陣|阵[zhen4],場|场[chang2]

(literary) to rain / (of rain, snow etc) to fall / to precipitate / to wet

not to have / no / none / not / to lack / un- / -less

to hinder / to block / to obstruct