Ge-wis

According to the Old English Dictionary:

-wiss;

ge-wis

adj. Certain, sure, knowing, foreknowing; certus :-- Gewis be heora gerihtnesse certus de illorum correctione, Bd. 5, 22; S. 644, 45. Ðæt is gesægd ðæt he wǽre gewis his sylfes forþfóre qui præscius sui obitus exstitisse videtur, 4, 24; S. 599, 14. Wite ðæt érest gewiss ðæt ðæt mód byþ ðære sáwle ǽge know first that as certain, that the mind is the soul's eye, Shrn. 178, 2. Gewis is constat, Hpt. Gl. 419. Ða úþwitan ðe sǽdon ðæt nǽfre nán wiht gewisses nǽre búton twæónunga the philosophers that said that there was no certainty without doubt, Shrn. 174, 25. Swá litel gewis funden found so little certain, Bt. 41, 4; Fox 250, 20. Gewis andgit intelligence, 5; Fox 252, 20, 30. We syndon gewisse ðínes lífes we are acquainted with thy life, Guthl. 5; Gdwin. 30, 18. He hí gewisse gedyde and gelǽrde be ingonge ðæs écan ríces de ingressu regni æterni certos reddidit, Bd. 4, 16; S. 584, 35. On gewissum tídum at certain times, R. Ben. interl. 48. Of gewissum intingan of certain causes, R. Ben. interl. 63. Myd gewyssum gesceáde with certain reason, wherefore; propter certam rationem, quapropter, Nicod. 3; Thw. 2, 6. [O. H. Ger. giwis: Ger. gewiss certus.] ge-wis,gewis