Probably from an unused root in the literal sense of entangling; a spider (as weaving a network) -- spider.
H5908. akkabish
עַכָּבִישׁ noun masculine spider (עַכָּבִיתָא עַכּוּבִיתָא, ᵑ7; whence Arabic as loan-word; Late Hebrew עַכְשׁוּב probably tarantula, according to LevyNHWB iii.648); — ע ׳בֵּית Job 8:14 i.e. web, so probably 27:18 (reading ׳ע for עָשׁ ᵑ0); compare ע ׳קוּרֵי Isaiah 59:5 filaments of a spider.