語源は不明だが、おそらく中英語のgobbe, piece、語源はgobと同じ、またはchop, to chop、つまり切り落とす、からきていると思われる。後に一般化し、物、仕事、作業、対象物などを意味する。
job 刺す、突くjabと同じ語源を持つオノマトペからの可能性。
job. (1) A low mean lucrative busy affair. (2) Petty, piddling work; a piece of chance work. [Johnson's Dictionary]On the job "hard at work" is from 1882. Job lot is from obsolete sense of "cartload, lump," which might also ultimately be from gob. Job security attested by 1954; job description by 1920; job-sharing by 1972.