By reduplication from zuwr; properly, tightly girt, i.e. Probably a racer, or some fleet animal (as being slender in the waist) -- + greyhound.
see HEBREW zuwr
H2223. zarzir
זַרְזִיר adjective girded, girt (compare BaNB 206) — only construct Proverbs 30:31 אוֺתָֿ֑יִו מָתְנַיִם זַרְזִיר that which is girt in the loins, etc., named with lion, he-goat, and king, as stately in motion. Perhaps = grey-hound Ew Bö De and others, or war-horse Bo Ges Hi and others; Vrss. cock, Talmud raven, see De Now (Late Hebrew זַרְזִיר starling (war-horse only in interpretation of 30:31), Aramaic ; Lexicons also starling, in Arabic , perhaps loan-word Others derive from a √זרר, see above)
זַרְזִיר Proverbs 30:31 see below III. זוּר.