維持

1. Origins, structure, and basic meaning

• Structure: 維持, read いじ, combines holding together 維 with keeping 持 to denote continuation of a state.
• Basic usage: It means preserving an existing state or function so it continues, as in 健康を維持する.

2. Common pitfalls and similar expressions

• Scope and context
  • It focuses on keeping the current level from deteriorating rather than improving it 改善 and may require ongoing management.