trailing dust; aftereffects
Literally, dust raised behind something moving; figuratively, lingering effects or aftermath of an event. Often used in literary or formal contexts.
After the carriage passed, trailing dust swirled in the air.
The aftereffects of the war cast a long shadow over people's lives.
Compound of 余 (yo, 'remaining, leftover') and 塵 (jin, 'dust'). The figurative sense derives from the idea of dust that continues to swirl after something has passed.