From an unused root meaning to be pointed; a twig (as tapering) -- bough.
H5577. sansin
[סַנְסִנִּים noun [masculine] plural fruit-stalk of date (Löwp. 119) (Aramaic loan-word from PS2617 racemus dactylorum, compare Assyrian sissinnu, part of the date-palm Dl507); — suffix בְּסַנְסִנָּ֑יו אֹחֲזָה Cant 7:9.