(archaic) iron / (figuratively) something extremely strong

a horseshoe (metallic shoe of a horse)

to turn on, to switch on

hoof

a hoof / (figuratively, uncommon) an excellent horse, a fast horse / (rare) an ungulate, a hoofed animal

哲理: philosophical principles

carriage of the hand

哲: a male given name

鉄: iron (metal)

哲也: a male given name / 徹也: a male given name / 鉄也: a male given name / 哲哉: a male given name / 徹哉: a male given name