some insignificant vine-product, usually taken as grape-kernels, grape-stones
Strong's H2785חַרְצַן: a sour grape (as sharp in taste) KJV:kernel.
Meanings: Brown-Driver-Briggs (1906) and Strong's Hebrew Dictionary (1890), public domain, via the Open Scriptures Hebrew Bible Project (CC BY 4.0). TWOT numbers for reference only.
Root family 752: חָרַץḥāraṣ — cut, sharpen, decide; mutilate; decisive; point, wound, be alert; bestir self, decree, determine, maim, move