'ancillaries' originates from Latin, specifically the word 'ancillaris,' where 'ancilla' meant 'maidservant' or 'female servant.'

'ancillaris' changed from the Latin word 'ancilla' and eventually became the modern English word 'ancillary' (with 'ancillaries' as its plural form) through Medieval Latin and English.

Initially, it meant 'pertaining to a maidservant or helper,' but over time it evolved into its current meaning of 'providing necessary support or auxiliary services.'