乳

rǔ
Left: trust 孚 (To the hand reaching down 爫, the child 子 is trusting), right: kneeling person 乚
To reach down to the child, when you yourself are kneeing: You give breast and milk.

孔

kǒng
Left: child 子, right: kneeling person 乚
A child is kneeling in front of the hole Confucius used to live in.

吼

hǒu
Left: mouth 口, right: dwellings, Confucius 孔 (A child 子 is kneeling 乚 in front of the hole Confucius used to live in.), here: variant of breast, milk 乳
A baby's mouth 口 that wants milk 乳 is roaring.