IPA: /ˈleɪbərər/
KK: /ˈleɪbərər/
A person who does physical work, especially in construction or manual labor.
The labourer worked hard to build the new road.
Labourer → It is formed from "labour" (from Old French *labor*, meaning work or toil) and "-er" (meaning a person who). A labourer is a person who works or toils.
Think of someone who is 'working' ('labour') — the '-er' just means a person. A labourer is someone who is engaged in work.