Definition (full): to fasten up, with a, bar, cord, to sandal, furnish with slippers
Strong's Exhaustive Concordance
A primitive root; properly, to fasten up, i.e. With a bar or cord; hence (denominative from na'al), to sandal, i.e. Furnish with slippers -- bolt, inclose, lock, shoe, shut up.
KJV: When he was gone out, his servants came; and when they saw that, behold, the doors of the parlour were locked, they said, Surely he covereth his feet in his summer chamber.
NASB: When he had gone out, his servants came and looked, and behold, the doors of the roof chamber were locked; and they said, "He is only relieving himself in the cool room."
KJV: And she had a garment of divers colours upon her: for with such robes were the king's daughters that were virgins apparelled. Then his servant brought her out, and bolted the door after her.
NASB: Now she had on a long-sleeved garment; for in this manner the virgin daughters of the king dressed themselves in robes. Then his attendant took her out and locked the door behind her.
KJV: And the men which were expressed by name rose up, and took the captives, and with the spoil clothed all that were naked among them, and arrayed them, and shod them, and gave them to eat and to drink, and anointed them, and carried all the feeble of them upon asses, and brought them to Jericho, the city of palm trees, to their brethren: then they returned to Samaria.
NASB: Then the men who were designated by name arose, took the captives, and they clothed all their naked ones from the spoil; and they gave them clothes and sandals, fed them and gave them drink, anointed them with oil, led all their feeble ones on donkeys, and brought them to Jericho, the city of palm trees, to their brothers; then they returned to Samaria.