Piþa

According to the Old English Dictionary:

an;

piþa

m. Pith, the soft inner part of the stem of a plant :-- Eall se ðǽl se ðe ðæs treówes on twelf mónþum geweaxeþ, hé onginþ of ðám wyrtrumum, and swá upweardes gréwþ óþ ðone stemn, and siððan andlang ðæs piþan and andlang ðære rinde óþ ðone helm, Bt. 34, 10; Fox 150, 2. Þeahtigaþ on hiera módes rinde monig gód weorc tó wyrcanne, ac on ðam piþan biþ óðer gehýded, Past. 9 ; Swt. 55, 23. Nim ellenes piþan, Lchdm. iii. 90, 2. piþa