Etymology

Tersanctus

T1E1R1S1A1N1C3T1U1S1

Today it means: The Trisagion (beginning “Holy God, Holy Mighty, Holy Immortal …”). Full definition →

Ecclesiastical Latin tersānctus
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The story

  1. Ecclesiastical Latin · borrowed fromtersānctus
  2. English todayTersanctus

Borrowed from Ecclesiastical Latin tersānctus, from ter (“thrice”) + sānctus (“holy”).

Etymology from Wiktionary, CC BY-SA 4.0.