Thanks.
I pulled out my copy and I suspect the reason that "yam suf" is described as the "northwestern part of the Red Sea" is a matter of narrowing down the Biblical geography; as if to say, "where the famous Exodus scene took place."
I'm experienced with roots and concepts, word plays and numerics and a lot of off-the-beaten-path stuff, but normal language skills are non-existent.
Well, there are only so many hours in the day! 🙃
(I find the best prizes though!)
My dictionary is clearly geared to someone wanting to read the Hebrew Bible, not to an immigrant or tourist in modern day Israel.