simple work; repetitive job; unskilled work; menial work
Refers to tasks that are straightforward, often repetitive, and require little skill or training. Can carry a slightly negative connotation of being tedious or low-level.
Repeating simple tasks at the factory is tiring.
He is not good at menial work and gets bored quickly.
Compound of 単純 (simple) and 作業 (work, operation). The exact historical derivation is straightforward; the word is a modern combination of these two Sino-Japanese elements.