Þǽsma
Bosworth & Toller Anglo-Saxon Old English Dictionary - þǽsma
According to the Old English Dictionary:
an;
- þǽsma
- m. Leaven :-- Þǽsma godcundre rihtwísnesse fermentum divinae justitiae, R. Ben. 10, 18. [O. H. Ger. deismo fermentum : Du. deesem leaven.] þæsma