Question
Dear Rabbi, "Pareve" is a very common term. Has it always been this way, and when did it originate? Also, what is the source of the word? Thank you.

Question
Sometimes I travel by airplane with a carry-on only and no checked luggage. Included in my carry-on are my tefillin and siddur. Airport regulations prohibit leaving luggage unattended or with a stranger. What is one supposed to do if they have to use the restroom at the airport, but their tefillin and siddur are in their luggage that must be kept with them and therefore brought into the restroom?

Question
As we know, there are two main forms of Hebrew: Ashkenazi and Sefardi. And the most notable difference between them is the pronunciation of the last letter, the ת, as either an S or a T. Though the T-sound is considered Sefardi, I hear plenty of Ashkenazim using it. And I hear people who constantly switch around between the two, using them interchangeably, sometimes even in the same verse! (Example “YiTgadal V’YiSkadash”) How important is it to pronounce this letter according to one’s heritage? If one pronounces it differently from one’s family custom, is the prayer or blessing still valid? If a Torah reader pronounces it unlike his tradition, must he be corrected? How about if one suddenly decides to change because he joins a congregation that does it the other way or simply wants to?