The word 'staff' originates from the Old English 'stæf', which referred to a stick, rod, or writing implement. This term is rooted in the wider Germanic family, seen in Old High German 'stab' and Old Norse 'stafr', all sharing the core meaning of a stick. The semantic journey from a physical stick to a group of supporting people is a metaphorical extension; just as a stick provides support, the staff of an organization supports its operations. The military sense of a body of officers assisting a commander, which emerged in the early 18th century, was pivotal in solidifying this abstract, collective meaning.

The word 'staff' is a simplex word of Germanic origin. It functions as a single, unanalyzable morpheme in modern English.