mid-14c., "laborer, toiler, performer, doer," agent noun from work (v.). As a type of bee, 1747. As "one employed for a wage," 1848. Old English had wyrcend "worker, laborer."
he is a good worker
workers of the world--unite!
he's a miracle worker
workaday
workaholic
workaround
workbook
workday
worker
workflow
workforce
workhorse
workhouse
working