The word "弃若敝屣" is formed by sequentially combining the characters 弃 (to discard), 若 (like), 敝 (worn-out), and 屣 (shoes), resulting in a literal meaning of "discard like worn-out shoes". This construction directly sets up a simile where the action of discarding is compared to treating an object as valueless as ragged footwear, forming a fixed metaphorical expression from classical Chinese that conveys outright rejection without additional linguistic elaboration.