Sisu
noun /ˈsiːsuː/ — The extraordinary determination to persist when all logic says stop.
Definition
A Finnish concept of extraordinary resilience, determination, and grit; the courage and willpower to continue in the face of challenges that exceed rational capacity.
Beyond the definition
The Finns consider sisu a defining national characteristic — forged partly by their history of survival against larger powers, harsh winters, and scarce resources. It's not just perseverance; it's the ability to act despite knowing the odds are against you.
Origin & history
From Finnish sisukas — gritty, determined. Related to sisu, an old Finnish word for the interior of the body — literally, the guts. Sisu is gut-level determination.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
She finished the race on a stress fracture. That's sisu.
Sisu is not recklessness — it's choosing the hard thing with your eyes open.
The Finnish education system is built around sisu as much as intelligence.
Synonyms
grit, resilience, fortitude, determination, perseverance
Antonyms
giving up, fragility, retreat
Related words
Sisu vs grit
Sisu is a Finnish concept of stoic, almost mystical determination in the face of impossible odds. Grit is the psychological trait of persevering toward long-term goals despite setbacks.
Compare this word
Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Shoot through marble crack
A small green shoot grows through a jagged crack in a heavy marble floor near a tarnished compass.
The plant's endurance against the unyielding stone represents sisu. It illustrates the gritty, extraordinary determination to continue growing in surroundings that far exceed what is normally considered possible for such a small, fragile life force to overcome.
Image credit: Wordspun · AI-generated conceptual illustration