motherkin

Etymology

From mother + -kin.

motherkin means Fond term of address for one's mother. Lexicurio rates it Sui generis — a strength score of 88 out of 100.

noun

Fond term of address for one's mother.
Fond term of address for a woman older than the speaker“"Motherkin," I answered, "what I mean is that I would sleep until I wake, for I have come a prodigious distance and have last slept in the woods […]"”