Ge-sibsum

According to the Old English Dictionary:

-sybsum, -sibbsum;

ge-sibsum

adj. [sibsum peaceable] Peaceable, peaceful, loving peace; pacatus, pācĭfĭcus :-- Se ðe of Gode cymþ he biþ gódes willan and gesibsum that which comes from God is of good will and peaceful, Past. 46, 3; Swt. 349, 1; Hat. MS. 66 b, 5, 7. On óðre wísan sint to manigenne ða gesibsuman the peaceful are to be admonished in one way, 46, 1; Swt. 345, 6; Hat. MS. 65 b, 22: 46, 5; Swt. 351, 3; Hat. MS. 67 a, 12: 46, 7; Swt. 355, 9; Hat. MS. 67 b, 19: 47, 1; Swt. 357, 15; Hat. MS. 68 a, 1S, 19. ge-sibsum