A unique Finnish concept describing a combination of determination, courage, and resilience in the face of adversity.

Origin: The word 'sisu' originates from the Finnish language, where it literally means 'guts' or 'inner strength'.
Historical and Cultural Context: The concept of sisu has been a part of Finnish culture for centuries, often associated with the country's harsh climate and history of overcoming challenges.
Evolution: While originally referring to physical guts, the term evolved to encompass mental fortitude and perseverance, especially during the 20th century as Finland faced significant historical challenges.
Modern Relevance: Today, sisu is celebrated as a defining characteristic of Finnish identity, often invoked in sports, business, and personal challenges. It is recognized internationally as a symbol of resilience.

Sisu is so integral to Finnish culture that it has been the subject of numerous studies and even inspired a 'Sisu' brand of heavy-duty vehicles in Finland.