• 収入しゅうにゅう — Income
• 収穫しゅうかく — Harvest
• 回収かいしゅう — Collection, retrieval
• 吸収きゅうしゅう — Absorption
• 収納しゅうのう — Storage, putting away

The character 収 originally depicted “bringing in by hand” — a concept tied to collection or resolution. Commonly used in economic, storage, and resolution-related contexts. Also found in advanced words like 吸収 (absorb) and 収監 (incarcerate).

毎月まいつきの収入しゅうにゅうは 安定あんていしています。
My monthly income is stable.

本ほんを 本棚ほんだなに 収おさめた。
I stored the books in the bookshelf.

Use シュウ for compound terms like 収入 or 吸収. The kun-yomi おさめる・おさまる is used when describing placing things inside, calming situations, or settling matters.