• v. To elaborate.

  • v. To improve.

  • v. To add, contribute.

Example Sentences

  • “When the Mashgiach saw that the bochrim were going back to their same practices, he was moisif on his rules.” (Weiser)

  • “The yeshiva thought they could be moisif on the appearance of the Beis Medrash just by painting." (Weiser)

  • “The music was moisif on the atmosphere of the event.” (Weiser)

  • "And that’s why Ashkenazim tend to be more strict: because they don’t have a clear Mesora, so they had to be moisif." (source)

Languages of Origin

  • Textual Hebrew
  • Yiddish


  • Y מוסיף זײַן moysef zayn

    • Who Uses This

      • Orthodox: Jews who identify as Orthodox and observe halacha (Jewish law)


      • North America


      • Frumspeak: The First Dictionary of Yeshivish, by Chaim Weiser (Northvale, 1995).

      Alternative Spellings

      to be moysif

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