母御 is read as ははご (hahago) and means mother.
ははご
hahago
おたあさま
mother
おっかさん
ぼせい
motherhood
ぼこう
home port
ぼせいあい
maternal love
ぼせん
depot ship
ぼしたいこうせい
ability to oppose the thumb
ぼぶんか
(one's) native culture
ぼせいほんのう
maternal instinct
ぼしとも
both mother and child
ぼかんすう
generating function
ぼいんちょうわ
vowel harmony