万全

1. Origins, structure, and basic meaning

• Structure: 万全(ばんぜん) is a noun describing preparation or a condition as complete, with nothing lacking.
• Basic usage: It modifies preparation in 万全の準備 and predicates physical condition in 体調は万全だ.

2. Common pitfalls and similar expressions

• Preparation and condition
  • It can describe having every necessary preparation in place or being in excellent physical condition.
• Linking forms
  • Use 万全の before a noun and 万全だ when completing a statement about a condition.