Not Enunciating Hashem's Name as It Is Written

From Halachipedia

Saying Hashem's Name as It Is Written

  1. It is forbidden to recite Hashem's name as it is written. In fact, Chazal state that it is such a grave sin it is punished with the loss of one's share in the World to Come.[1] Therefore, instead a person should use the accepted pronunciation of Hashem's name of Adnut, generally pronounced "Adonay", instead of the way it is written.[2]
  2. It is forbidden to say Hashem's name as it is written even if one's intention isn't for Hashem at all or for another purpose.[3]

Abaye Hava Mesader

  1. When recite Abaye Hava Omer, some say that a person should be careful to pause between the words Abaye and Hava since saying them quickly together sounds like the enunciation of Hashem's name as it is written.[4] Others say that it is permissible since one doesn't intend to enunciate Hashem's name. It is preferable to pause[5] or skip the word Hava altogether.[6]

J-Witnesses

  1. It is permitted to say the word Jahova since it isn't the halachically accepted pronunciation of the letters of Hashem's written name.[7]

Saying the Letters

  1. Just as it is forbidden to recite Hashem's name as it is written, it is similarly forbidden to enunciate the letters of Hashem's name, Yud Hey Vav Hey.[8] Therefore, when saying the LeShem Yichud a person shouldn't say Yud Hey Vav Hey; instead they should say Yud Key Vav Key. See Leshem_Yichud#Reciting_Hashem.27s_Name for details.
  2. This doesn't apply to the name of Adnut. Therefore, it is permitted to say Aleph, Daled, Nun, Yud.[9]

Names of Angels

  1. A person shouldn't call certain angels by their name directly. For example, Sama'el shouldn't be called that directly, rather he should be called Same'ach Mem. Additionally, Mematron shouldn't be called by his name but by Mem Tet.[10]

Sources

  1. Sanhedrin 90a
  2. Pesachim 50a, Mishna Brurah 5:2, Yabia Omer 8:11:7
  3. Har Tzvi OC 1:5
  4. Ben Ish Chay Shana Rishona Miketz n. 9
  5. Yabia Omer OC 8:11:7 writes that although in our texts of the Gemara it doesn't say Abaye Hava Mesader and Hava is omitted, most siddurim do have it. He concludes that it is permissible to say it quickly since one doesn't intend on saying Hashem's name as Tosfot Shevuot 35a writes. halachayomit.co.il reiterates this ruling.
  6. See Yabia Omer 8:11:7
  7. Rabbi Ari Enkin. See also Rabbi Gil Student who agreed for another reason.
  8. Tosfot Sukkah 5a, Yabia Omer OC 9:12, Lehorot Natan 6:83, Piskei Teshuvot 5:4. In these teshuvot they cite Nodah Beyehuda 1:93 who claims that there's no issue and they disagree.
  9. Kaf Hachaim 5:9 citing Zachor Lavraham 5:1 and Radvaz (Leshonot Rambam 35)
  10. Kaf Hachaim 5:10