Etymology

uno flatu

Today it means: At once, at one blast, at the same moment, contemporaneously, simultaneously. Full definition →

Latin ūnō flātū
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The story

  1. Latin · borrowed fromūnō flātū“in one breath”, “at one blast”
  2. English todayuno flatu

Borrowed from Latin ūnō flātū (“in one breath”, “at one blast”), ablative of time-within-which of ūnus flātus (“a single blast of wind or expulsion of breath”).

Etymology from Wiktionary, CC BY-SA 4.0.