For-sencan

According to the Old English Dictionary:

for-sencan

p. te To let fall, drop :-- Forsencð hé ðone wæsðm his gǽstes ferre fructum spiritus recusat, Past. 347, 13. [N. E. D. for-sench. O. H. Ger. fer-senchen: Ger. ver-senken.] for-sencan