SAHWERSA

The word is used (45 times?) in a variety of spellings (SA-, SAH-, SÁH-, H-) and mostly meaning 'in case', 'if', 'when' etc., examples:

[003/05] SÁHWERSA HJA VPBROCHT WÉRON AN SINA WLE LÉR

when they had been brought up in his evil ways

[003/25] SÁHWERSA ALLRA.MANNELIK [30] NW BIÁMA ÀND BIJECHTA MOT

Because all must agree and affirm

[004/25] SAWERSA J ÀFTA FRYA.S BÀRN WILLE NÀMMER TO WINNADE HOR THRVCH LESTA NER THRVCH WÉPNE

If you want your children to remain true Fryas, not to be conquered by either intrigue or force of arms

[007/05] HWERSA THÉR FISKA INVR WÉTER WÉRE

if there were fish in the water

The Richthofen dictionary (1840) has more explanation (mostly in Latin). Compare: "where two dogs fight for a bone, a third will run away with it".