Lexical Definition

‎אָבַךְ‎ ʼâbak (aw-bak') to roll up H:V
a primitive root

mount up.

1) to roll, turn
1a) (Hithpael) to roll, roll up, billow

Usage: 1 form in 1 verse
Form Translated As     In Verse(s)
וַיִּֽתְאַבְּכ֖וּ and they have swirled Isa.9.18

Brown-Driver-Briggs

[‎אָבַךְ‎] verb turn (?) (compare Assyrian Abâku Dlw = ‎הָפַךְ‎; Thes MV and others compare ‎בוך‎) Hithpa`el ‎וַיִּתְאַבְכוּ‎ Isa 9:17* roll, roll up, as volume of smoke (of Israel under figure of thickets of forest) see De & compare ‎הִתִהַפֵּךְ‎ Judg 7:3.

Brown-Driver-Briggs References

Book Refs
Judges 7:3
Isaiah 9:17*