IPA: /ˈwɜːrksaɪt/
KK: /ˈwɜrkˌsaɪt/
A place where people do their jobs, especially in construction or other physical work.
The workers arrived early at the worksite to prepare for the day's tasks.
Worksite is formed from "work" (from Old English *weorc*, meaning labor or effort) and "site" (from Latin *situs*, meaning position or location). The word refers to a location where work is performed or labor takes place.
Think of a place where 'labor' ('work') is done — that's what a 'worksite' means.