smoldering embers; dying fire
Refers to the last glowing remnants of a fire. Often used in literary or figurative contexts to describe lingering feelings or the final stages of something.
The embers of the campfire were still glowing red.
戦争の余燼がくすぶり続けている。
The smoldering embers of war continue to burn.
Compound of 余 (yo, 'remaining') and 燼 (jin, 'embers'). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning of lingering fire.