“ This word is probably of Scandinavian origin, and is cognate with a Swedish dialect word lomra, meaning “to roar,” a frequentative of ljumma, “to make a noise.” The English word may be of native origin and merely onomatopoeic. The New English Dictionary, though admitting the probability of the association with “Lombard,” prefers the second proposed derivation. The application of the word to timber is of American origin ”