sn Four different words for "locust" are used in this verse. Whether these words represent different life-stages of the locusts, or whether virtual synonyms are being used to underscore the severity of damage caused by the relentless waves of locust invasion, is not entirely certain. The latter seems more likely. Many interpreters have understood the locust plagues described here to be symbolic of invading armies that will devastate the land, but the symbolism could also work the other way, with real plagues of locusts described in the following verses as an invading army.