Senses
落后/ 落後 to fall behind
To lag behind others in speed, progress, or position; to fall into the rear during movement.
落后/ 落後 backward
To be underdeveloped or outdated in technology, thought, or level of development; to remain at a lower level compared to what is advanced.
落后/ 落後 later
Used in early literature to mean afterwards or at the very end.
落后/ 落後 to neglect
To treat coldly, neglect, or abandon in a literary context.