Abarim Publications' online Biblical Hebrew Dictionary
The verb אחז (ahaz), meaning to take hold of, seize or grasp, is used in pretty much any sense in which two naturally disconnected entities become firmly united.
Beams connect walls (or not - 1 Kings 6:6), cords hold curtains (Esther 1:6), and a footstool is attached to Solomon's throne (2 Chronicles 9:18). Jacob holds on to Esau's heel (Genesis 25:26), Ruth holds on to her cloak (Ruth 3:15), and men keep swords on their hips (Song 3:8). God holds people to shake them to pieces (Job 16:12) or to guide them (Psalm 73:23, 139:10). Pain or fear seizes people (Exodus 15:14, 2 Samuel 1:9). The righteous holds on to his way (Job 17:9). One in every fifty is selected (Numbers 31:30), or taken by lot (1 Chronicles 24:6).
This verb's sole derivative is the feminine noun אחזה (ahuzza), meaning possession, or that what is held, seized (Genesis 36:43, Numbers 27:7, Psalm 2:8).