证券

negotiable security (financial) / certificate / stocks and bonds

to admonish / variant of 證|证[zheng4]

certificate / proof / to prove / to demonstrate / to confirm / variant of 症[zheng4]

bond (esp. document split in two, with each party holding one half) / contract / deed (i.e. title deeds) / ticket / voucher / certificate

variant of 券[quan4]