Refers to using something again, often in contexts like recycling, repurposing, or reusing resources.
この容器は再使用できます。
This container can be reused.
再使用可能なエネルギー源を開発する。
Develop reusable energy sources.
再使用 is a more formal or technical word for reuse, often seen in legal or engineering contexts, whereas 再利用 is the everyday, general term.
reusable
Compound of 再 (re-, again) and 使用 (use). The reading さいしよう is the standard on'yomi combination.