Jerry - The word sheynis,or sheynit means a second time. It is said as part of the additional service every Sabbath as well as on holidays. The entire phrase translation is: "and He will hear us in His mercy a second time in the presence of all the living (His promise)to be your G-d."This is found in the congregational prayer called the Kedusha.
We also have to watch the las Hebrew letter which can be pronounced as a "t" or a "s". Modern Hebrew folksongs, will use the "t" and older folk songswill likely use the "s". That should keep us on our toes!
Speed