Ordinaric

 is a xenogender that feels so familiar that one is so used to it being there that it feels forgotten or ignored unless looked for.

Etymology
“Ordinar-” from “ordinary” + the suffix “-ic”

Pronunciation
or-di-NA-ric

Definitions

 * A gender that feels similar to an object that has been in a room for so long or is so familiar that people are so used to it being there that it feels forgotten or ignored unless looked for. - tobastreasury, 2021

History
Ordinaric was coined by tobastreasury on Tumblr on December 26th, 2021. The flag was coined in the same post