予算

1. Origins, structure, and basic meaning

• Structure: 予算 (よさん) is a noun for an amount allocated in advance as a budget.
• Basic usage: 旅行の予算を決める sets a spending limit; 予算の中で修理する performs repairs within an existing limit.

2. Common pitfalls and similar expressions

• Setting and working within a budget
  • を決める establishes the amount, whereas の中で treats the allocated amount as a constraint.