to know through one's own experience

school grammar / (specifically) Japanese school grammar, based on Shinkichi Hashimoto's work and now universally employed in Japanese schools and dictionaries.

school for special needs

to have no way of knowing; to be completely ignorant of

to make known

(Classical Japanese, archaic, honorific) to know

driving school

God only knows

(Classical Japanese, archaic, Western Japanese) Alternative imperative of する (suru, “to do”)

one's deed / cause, reason