his-and-hers

The phrase 'his-and-hers' is a modern English compound that emerged in the 20th century, primarily in the context of marketing and consumer goods. It directly utilizes the standard English possessive pronouns 'his' and 'hers', which themselves derive from the Old English masculine and feminine genitive forms. The compound logic is transparently literal, combining these two distinct possessives with the conjunction 'and' to create a single adjectival unit. This formation elegantly denotes items produced in matching pairs intended for the two conventional members of a couple, reflecting social customs and commercial strategies that emphasize partnership through coordinated possessions.

This is a fixed compound phrase functioning as a single adjective. It is formed from the possessive pronouns 'his' (from Old English 'his', genitive of 'he') and 'hers' (from Middle English 'heres', genitive of 'she'), connected by 'and' (from Old English 'and', 'ond').