2026-09-03 (session 4 of the day) — Thirteenth word: sisu (Finnish)

This project is building a rigorously sourced knowledge base on "untranslatable words" — the popular phenomenon of words like hygge or saudade marketed in English as capturing something no other language can, the academic tradition that studies untranslatability more carefully, and the linguistics underneath both. The long-term goal (not yet reached) is to move from cataloguing to original research: does each celebrated word's untranslatability claim actually survive contact with the evidence?

Twelve word case studies existed before today, each picked to test a different language family or a different way a popular claim can turn out to be overstated, understated, or genuinely correct. This session added a thirteenth: sisu, the Finnish word for grit, stoic determination, and the capacity to keep going long after most people would quit. It is the project's first word from the Uralic language family (Finnish is unrelated to English, the Romance languages, or the Slavic languages already on file), chosen because it had three concrete, promising leads: an active academic psychology research program built specifically around this word, a well-known tie to Finland's 1939–40 Winter War against the Soviet Union, and a 2017–18 wave of English lifestyle books marketing it the same way earlier books marketed hygge and lagom.

What the research found. Unlike several earlier words, sisu's origin in Finnish is not disputed or borrowed — it comes straightforwardly from a Finnish root meaning "inner," the same body-metaphor logic behind English words like "guts" or "backbone." What makes this word interesting instead is that three different institutions are currently pulling its meaning in different directions: a serious academic research program (led by a Finnish psychologist, Emilia Lahti, who has built an actual measurement scale for the trait and explicitly distinguishes it from the "grit" concept made famous by psychologist Angela Duckworth — the two have engaged with each other's work directly); the word's long-standing tie to Finnish military heroism, reinforced today by a very violent 2022–23 action film literally named Sisu; and a lifestyle-marketing book wave selling it to English readers as the next self-help trend after Danish coziness and Swedish moderation. No word studied so far pulls in three such different directions at once.

One genuinely new finding: this is the first word on file where the project could confirm that the Oxford English Dictionary actually has an entry for it (previous words' OED status was always secondhand or entirely unconfirmed — the dictionary's website blocks automated access to the actual definitions, a standing problem for this project). Only the bibliographic bones came through — one meaning, earliest recorded English use in 1926 — but that 1926 date is itself a puzzle: it is fourteen years earlier than the 1940 date another Finnish-word dictionary shows, and 1940 is when popular accounts say the Winter War introduced the word to English. That contradiction is recorded, not resolved.

What didn't work. The project could not find a single example of a professional translator's actual choice of how to render "sisu" in a published English translation of Finnish literature — a gap shared with several earlier words. It also could not read Finland's own official dictionary of the word, because that dictionary's website is built as an interactive app rather than plain web pages, and no way was found this session to pull data from it directly (a different, newer kind of technical obstacle than this project has hit before, though a related one).

What this means. The project's knowledge base now covers thirteen words across twelve language families/branches, each documenting a different way popular "untranslatable word" claims hold up or don't under scrutiny. No change to the project's own goals or methods is needed.

Next steps, recorded in the project's own working file: try to find a legitimately obtained copy of a specific Finnish war novel to check how "sisu" gets translated; try again later to get into the official Finnish dictionary and the paywalled OED definition; and either add a fourteenth word (a Middle Eastern or East Asian language would round out the language coverage) or fill in one of these Finnish gaps.

Nothing is needed from you right now. No open question is waiting on your input.