Source: Oxford English Dictionary — "sisu, n." (reported, not directly consulted)
- Title: sisu, n.
- Publication: Oxford English Dictionary (oed.com)
- URL: https://www.oed.com/dictionary/sisu_n
- Type: primary lexicographic authority in principle — but not directly consulted; this project's standing fence holds that OED pages redirect through an SSO/login wall inaccessible to its tools (confirmed again this session:
WebFetchreturned only the page's free metadata, not the definition text, which is paywalled). Recorded here as reported, at the same confidence level as this project's other OED entries (hygge, wabi-sabi, jugaad), not as a directly-read source. - Accessed (metadata only): 2026-09-03
Extract
- The OED carries one noun entry for sisu, etymology given as a borrowing from Finnish (etymon: Finnish sisu).
- Earliest cited use: 1926, in the writing of J. J. Tikkanen — per a separate WebSearch, likely the Finnish-Swedish art historian Johan Jakob Tikkanen (1857–1930), though this project has not confirmed the specific work quoted or seen the actual 1926 citation text.
- Reported pronunciation: British /ˈsiːsuː/, U.S. /ˈsiˌsu/.
- Reported frequency: approximately 0.01 occurrences per million words in modern written English — a rare loanword.
- The full definition text, and the exact 1926 quotation, are behind the paywall and not reproduced here.
Gaps
- The full definition and the exact 1926 quotation are unconfirmed — only bibliographic metadata (date, cited author's surname) reached this project.
- This creates a genuine, unresolved disagreement with the English Wiktionary entry (
wiktionary-sisu.md), which states the English word is "documented since at least 1940" (citing Time magazine) without mentioning any 1926 use — the OED's reported 1926 date, if confirmed, would push the word's documented English-language history back 14 years earlier than Wiktionary's own citation record, and notably before the Winter War (1939–1940) that popular sources credit for introducing the word to English. Not resolved here; recorded as a disagreement, per this project's standing practice. - Whether J. J. Tikkanen's 1926 usage was in an English-language art-historical work, and in what sense (literal "guts/interior" vs. the figurative "grit" sense), is unknown to this project.