知

to know / to be aware

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls

arrow / dart / straight / to vow / to swear / old variant of 屎[shi3]

not knowing anything at all (idiom); completely ignorant / without an inkling

not known to anyone / secret / unknown

unknown / unable to find out

lit. to know one and understand half (idiom); a smattering of knowledge / dilettante / amateur

to know nothing about the beginning, the middle or the end / to know nothing at all

agnosticism, the philosophical doctrine that some questions about the universe are in principle unanswerable

a person who doesn't manage a household would not be aware how expensive it is (idiom)

lit. to reply "don't know" whatever the question (idiom) / fig. absolutely no idea of what's going on / complete ignorance

to be evident at a glance (idiom)

lit. the falling of one leaf heralds the coming of autumn (idiom) / fig. a small sign can indicate a great trend / a straw in the wind

It's a long and intricate story, I hardly know where to start.