-gə̇st noun
( plural youngest )
Etymology: Middle English yongest, yongeste, alteration (influenced by yong young) of yingest, yingeste, from Old English gyngesta, gyngsta, from gyngst, superl. of geong young
: one that is least old ; especially : the youngest child or member of a family
you can go back to your law office after our youngest grows up — Evelyn Barkins