The term 'BEAT THE SEEDS OUT OF GRAIN' can be summarized by the word 'THRASH, ' which is a 6-letter word. Thrashing is an agricultural process in which grain is separated from its husks and seeds by beating it with a tool such as a flail or a threshing machine. This process has been used for centuries to separate the edible parts of grain from the inedible parts, allowing farmers to harvest and store grain for food.