A primitive root; probably to coil upward -- mount up.
H55. abak
[אָבַךְ] verb turn (?) (compare Assyrian Abâku Dlw = הָפַךְ; Thes MV and others compare בוך)
Hithpa`el וַיִּתְאַבְכוּ Isaiah 9:17; roll, roll up, as volume of smoke (of Israel under figure of thickets of forest) see De & compare הִתִהַמֵּךְ Judges 7:3.