BT Pes 51b(15) :מדי דאיתה לגרידיה מששית‏ : something that exists all by itself from the sixth (year of the sabbatical cycle) †
See the entire entry for grīḏ adj. worn; mere

BT Pes 51b(15) :מדי דאיתה לגרידיה מששית‏ : whatever (grows) on its own from the sixth (year of the shmittah cycle)
See the entire entry for grydˀ adv. merely, alone

BT Pes 51b(15) :מדי דאיתה לגרידיה מששית ומפרי פרויי בשביעית‏ : something that exists all by itself from the sixth (year of the sabbatical cycle) but does bear fruit on the seventh
See the entire entry for pry vb. to be fruitful