More Than an Abbreviation
A teaching ofRav Nosson Tzvi Finkelהרב נתן צבי בן משה פינקל
Rebbi Yehudah made abbreviations for the Makos: Detzach, Adash, Be'achav. Why would such mere abbreviations matter? They are not mere abbreviations, but carry the highest lesson, to take care not to say anything that is unseemly.
Source: Chayei HaMussar, p. 285