The rare daily word game sweeping the globe. Find what's hidden in plain sight.
BOOK
Definition of BOOK
noun
A collection of sheets of paper bound together to hinge at one edge, containing printed or written material, pictures, etc.
Wiktionary · CC BY-SA
Where it comes from
From Middle English bok, book, from Old English bōc, from Proto-West Germanic *bōk, from Proto-Germanic *bōks. Bookmaker sense by clipping. Cognate with Scots beuk, buik, buke (“book”), Yola buke (“book”), North Frisian Bok, buk, bök (“book”), Saterland Frisian Bouk (“book”), West Frisian, Dutch boek (“book”), Alemannic German Buech (“book”), Bavarian Buach (“book”), Central Franconian Booch, Buch (“book”), German, Luxembourgish Buch (“book”), German Low German Book (“book”), Limburgish book, Bouk (“book”), Vilamovian büch (“book”), Yiddish בוך (bukh, “book”), Danish bog (“book”), Elfdalian buok (“book”), Faroese, Icelandic bók (“book”), Norwegian Bokmål, Norwegian Nynorsk and Swedish bok (“book”).
Etymology via Wiktionary (CC BY-SA).
Word DNA
Line of descent
3 recorded generations before English.
Deepest traced root
6th
of 59 source languages in OUTLIER
4.7%
of traced words share this origin (3,821)
branch · 22.6% of traced words
How it is built
Same root, BOOK · 17 relatives in the game
Its etymology also names Danish, Dutch, Icelandic, Norwegian, Scots, Swedish, Yiddish.
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
BOOK in OUTLIER
It has fitted 1 board so far. 30 players have found it across Outlier's history.
It first turned up on Day 153, 20 October 2026. Nobody has seen it on a board for 8 days.
First found by a player on Day 9, 29 May 2026.
Built from these letters
BOOK starts with B and ends with K. Sorted, its letters read BKOO - the shape to hunt for when the grid is scrambled. O appears more than once, including a double letter.
Same letters, different word
2 other words use exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Words that start BOOK
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found BOOK?
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 153 - and most players walked straight past it.
Play today's OUTLIER