rabbiofberlin,
You were moida in a previous thread (and this is a direct quote from you) “I freely admit that the preponderance of opinions is in your favoir as far as torah shebaal peh for women. this is evident from the Poskim you brought down.” in response to the various sources quoted regarding women and Torah Sh’Baal Peh.
Regarding the meaning of Tiflus, like the post on the previous page mentions: Rashi comments that Tiflus means lechery, meaning the study of Torah will lead women to immoral sexual acts.
And here are some additional sources regarding this issue, that were quoted on a previous thread:
Aruch Hashulchan
We have never taught women from a book, nor have we ever heard people actually do so. Rather every mother teaches her daughter well-known rules women should know.
Sefer Hachasidim
One should teach his daughters practical law – not because there is a requirement for them to learn, but so that they should know the laws. Once they know the laws, there is no need for them to learn any more.
Torah Temimah (R. Boruch Epstein, 12th century)
Girls do not have the intellectual stability and are, therefore, unable to make profound inquries with a sharp mind and appreciate the depth of the Torah. It is possible thay by using their own minds, they will transgress the Torah.
Tur (Yoreh Deah 246, 15)
Most women’s minds are not geared toward being taught, but if she had begun to study properly herself, not making Torah into foolishness, she is no longer like most women and she is rewarded…