erottamattomien
Erottamattomien is a Finnish grammatical form, specifically the genitive plural of the adjective erottamattomat, which means inseparable or indivisible. The form is used to indicate possession or association by a group described as inseparable, for example when referring to qualities or bonds belonging to such a group.
In Finnish, adjectives decline to reflect number and case, so erottamattomat becomes erottamattomien in the genitive
Usage and nuance: erottamattomien conveys a sense of close-knit unity or an unbreakable bond within a group.
See also: erottamattomat (the base form meaning inseparable), erottaminen (separation), ja kieltä erottuvat idioms that express