איוב מ:יז פירוש: רש״י

hardens Heb. יחפץ like יַחְפּוֹז, hardens. Similarly, in the language of the Sages: דַחַפִּיזָא כִּי אוּפְתָּא (Hullin 47b), hard as wood.

his testicles Heb. פַחֲדָיו.

are knit together Heb. ישרגו, twisted cords, like (Lam. 1:14), “they are knit together (ישתרגו),” or the webbing (שריגי) of a bed in the language of the Mishnah, (Moed Katan 1:8), and it is an expression of twisted cords.