残り

1. Origins, structure, and basic meaning

• Structure: 残り(のこり) is the part left after use or consumption, or the amount or time still remaining.
• Basic usage: It is used for leftover food and time left before a game ends.

2. Common pitfalls and similar expressions

• A noun related to 残る
  • 残る(のこる) is the verb meaning to remain, while 残り names the remainder. It can link to a following noun as in the first example's 残りのケーキ, or form a compound such as 残り時間.