余る

1. Origins, structure, and basic meaning

• Structure: In 余る (あまる), remainder stem 余 plus inflecting る forms an intransitive verb for being left over.
• Basic usage: 余る is intransitive and describes an amount remaining after what is needed has been supplied.

2. Common pitfalls and similar expressions

• Being left over
  • 余った modifies what remains, while 余るの nominalizes the clause; context identifies the item and amount.