# sisu

> English word · Noun · IPA /ˈsɪsʉː/ · frequency rank #97,555

## Definitions
1. Strength of will in the face of adversity; grit; perseverance; determination; regarded as an integral part of Finnish culture.

## Etymology
Borrowed from Finnish sisu, documented in English since at least 1940.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sisu