"Immutable characteristics" refers to traits or qualities that cannot be changed or altered. These are inherent attributes that stay the same over time and cannot be modified. Full definition
The grievor's representative further submitted that breastfeeding was an immutable or constructively immutable characteristic of a woman's gender (in that only women can breastfeed). (ottawaemploymentlaw.com)
The childcare obligations that are contemplated under family status should be those that have immutable or constructively immutable characteristics, such as those that form an integral component of the legal relationship between a parent and a child. (ropergreyell.com)
There are certain immutable characteristics of leadership, and in my view, the most important compass points for every great leader are these: (townepark.com)