Dikduk query

Dear Shalom,

I wanted to pose a dikduk question which has me perplexed.

I had thought that the plural form of 'nachala' is 'nachalot'. In fact, Yishayahu 49:8 has 'nechalot', as does Rav Kehati's usage in Bava Batra. I'd appreciate if someone can explain why that is the case, from a dikduk standpoint.

Thanks, and best wishes to all for a K'vch'T,

Shlomo

Shlomo Horwitz
Director, Jewish Crossroads
[www.jewishcrossroads.org]
Reality Programming for Jews who Think