noun
my mother; one's mother
Humble term used to refer to one's own mother when speaking to someone outside the family. Not used for the listener's mother.
愚母はいつもお世話になっております。
My mother is always indebted to you for your kindness.
愚母が申しておりましたが、先日はありがとうございました。
My mother mentioned that she was grateful for the other day.