lath (n.)
late 13c., probably from Old English *læððe, variant of lætt "lath," apparently from a Proto-Germanic *laþþo (cognates: Old Saxon, Old Norse latta, Middle Dutch, German latte "lath," Dutch lat, Middle High German lade "plank," which is source of German Laden "counter," hence, "shop"). As a verb, 1530s, from the noun.