雑巾
ぞうきん house-cloth; dust cloth
Why it means this
雑 (rough, odds-and-ends) + 巾 (a cloth) — a rag for wiping floors; 雑巾がけ, scrubbing floors, and figuratively doing the humble grunt work. Read ぞうきん.
Breakdown
Each character links to its full entry — origin story, stroke order, and readings.