noun
extensibility; scalability; expandability
Computing term for a system's ability to be extended, scaled, or augmented. Often used in software/hardware contexts.
このソフトウェアは拡張性が高いので、機能を追加しやすい。
This software has high extensibility, so it's easy to add features.
We need to design the system with scalability in mind.
柔軟性 means 'flexibility' in a broader sense, while 拡張性 is specifically about the ability to be extended or scaled, often in technical contexts.
Compound of 拡張 (extension) + 性 (property/quality). The exact historical derivation is uncertain, but the word follows a common pattern for technical terms.