from an unused root thought to mean to stop up by a barricade; perhaps fortification; Lakkum, a place in Palestine; Lakum.
Usages throughout the bible
Joshua 19:33
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And their coast was from Heleph, from Allon to Zaanannim, and Adami, Nekeb, and Jabneel, unto Lakum; H3946 and the outgoings thereof were at Jordan: