Literally: “inner strength, guts”
Extraordinary determination, grit, and resilience in the face of extreme adversity — courage that goes beyond momentary bravery into sustained, stoic endurance.
Etymology
Sisu derives from the Finnish sisus, meaning “interior” or “innards.” The metaphor is visceral: sisu comes from deep inside, beyond rational thought. It crystallized as a national concept during the Winter War of 1939-40, when Finland held off the Soviet invasion for over three months.
Cultural Context
Finland has elevated toughness into something philosophical. Sisu isn’t about being fearless — it’s about acting despite fear. It isn’t about strength — it’s about enduring when strength runs out.
Sisu appears everywhere in Finnish daily life: ice swimming at -20°C, walking to school in weather that would close schools elsewhere, and a disproportionate number of ultra-marathon runners.
But sisu has a gentler side too. It’s the single mother working two jobs and still reading bedtime stories. True sisu isn’t dramatic — it’s quiet, persistent, and deeply personal.
Modern Usage
Hän osoitti todellista sisua selviytymällä siitä kriisistä. — “She showed real sisu by getting through that crisis.”
Related Words
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