자 自 → by oneself, by one's own ability One should be able to open a jar by oneself.동 動 → move Ding-dong, time to get moving.판 販 → peddler No pre-made mnemonic available, please create your own.매 賣 → sell No pre-made mnemonic available, please create your own.기 機 → mold, machine A machine can make a key for you.