天书tiānshūTop 30000Meanings1. imperial edict2. heavenly book (superstition)3. obscure or illegible writing4. double dutchCharacters used天sky书bookExamples2看起来kànqǐlai这zhè都dōu是shì天书tiānshū。That was all Chinese to me.看起来kànqǐlai像xiàng天书tiānshū。It's all Greek to me.