means A person skilled in repairing and maintaining machinery, especially engines and vehicles.

from From Greek 'mēkhanikos,' meaning 'pertaining to machines or ingenious devices,' built on 'mēkhanē'—a contrivance or clever engine, the same root that gives us 'machine' and 'mechanism.' It traveled through Latin 'mechanicus' into English, where it first described anything related to manual labor or machinery before settling on the grease-handed expert who keeps the engines running.