The dictionary defines accumulative 1: CUMULATIVE (an of rapid and ~ change) 2: tending or given to accumulation. To get a better idea of this word, the same dictionary defines accumulate as to gather or pile up esp. little by little and to increase gradually little by little.
Born in 1863, Henry Ford was the first surviving son of William and Mary Ford, who owned a prosperous farm in Dearborn, Michigan. At 16, he left home for the nearby city of Detroit, where he found apprentice work as a machinist.
In the first several years of their marriage, Ford supported himself and his new wife by running a sawmill. In 1891, he returned with Clara to Detroit, where he was hired as an engineer for the Edison Illuminating Company.