Æt-ýconys
Bosworth & Toller Anglo-Saxon Old English Dictionary - æt-ýconys
According to the Old English Dictionary:
-ýcnys, -nyss,
- æt-ýconys
- e; f.An increase, addition; augmentum :-- Mid ætýccnysse cum augmento. Bd. 1, 27; S. 490, 24: 3, 22; S. 553, 14. æt-yconys