A primitive root (compare chagag); to describe a circle -- compass.
see HEBREW chagag
H2328. chug
[חוּג] verb draw round, make a circle (Aramaic circumivit; noun , חוּגְתָּא, circle, vault of heavens) —
Qal Perfect מים עלפֿני חָג חֹק Job 26:10 (compare Proverbs 8:27), hath drawn as a circle a bound, etc., of the horizon-line.