Biblical Hebrew Forum

["Chris and Nel" <wattswestmaas AT eircom.net>]

Stumbling accross psalm 51:7 I am perplexed as to the relationship between 
this root verb and say NoLaD which means to be born.  What perplexes me are 
two things here:

1.  Is this just idiomatic?  Twisting and turning in pain for example came 
also to mean "brought forth"?

2.  I would like to understand rather simply how the yod and vav are 
interchangeable since most hollow verbs follow an either/or pattern.

Thankyou

Chris.