The rare daily word game sweeping the globe. Find what's hidden in plain sight.
BIRO
Definition of BIRO
noun
A Biro brand ballpoint pen.
Wiktionary · CC BY-SA
Where it comes from
Genericized trademark of BIRO, named after László Bíró, the inventor of the first commercially succesful ballpoint pen.
Etymology via Wiktionary (CC BY-SA).
Word DNA
How it is built
Same root, BIRO · 1 relative in the game
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
BIRO in OUTLIER
Players have found it on 23 boards so far. 36 players have found it across Outlier's history.
It first turned up on Day 28, 17 June 2026. The most recent board was Day 147, 14 October 2026. Nobody has seen it on a board for 2 days.
First found by a player on Day 28, 17 June 2026.
Built from these letters
BIRO starts with B and ends with O. Sorted, its letters read BIOR - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Same letters, different word
One other word uses exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Words that start BIRO
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 28
Could you have found BIRO?
OUTLIER is a daily word game. One grid, the same grid for everybody, and the words nobody else spots are the ones that pay. This word was on Day 28 - and most players walked straight past it.
Play today's OUTLIER