Etymology

sisu

S1I1S1U1

Today it means: Strength of will in the face of adversity; grit, perseverance or determination, regarded as an integral part of Finnish culture. Full definition →

Finnish sisu
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The story

  1. Finnish · borrowed fromsisu
  2. English todaysisu

Borrowed from Finnish sisu, documented in English since at least 1940.

Etymology from Wiktionary, CC BY-SA 4.0.