The rare daily word game sweeping the globe. Find what's hidden in plain sight.
SURD
Definition of SURD
noun
An irrational number, especially one expressed using the √ symbol.
Wiktionary · CC BY-SA
Where it comes from
First attested in the mid 16th century from Latin surdus (“deaf, mute”), used in mathematics for “irrational,” reflecting ἄλογος (álogos, “irrational, speechless”) as found in Euclid, apparently transmitted via Arabic جِذْر أَصَمّ (jiḏr ʔaṣamm, “deaf root”). The phonetic sense, “voiceless,” emerged in the 18th century. Doublet of surdo.
Etymology via Wiktionary (CC BY-SA).
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
SURD in OUTLIER
Players have found it on 20 boards so far. 25 players have found it across Outlier's history.
It first turned up on Day 23, 12 June 2026. The most recent board was Day 114, 11 September 2026. Nobody has seen it on a board for 6 days.
First ever to find it
on Day 23, 12 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
SURD starts with S and ends with D. Sorted, its letters read DRSU - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
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 SURD
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found SURD?
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 23 - and most players walked straight past it.
Play today's OUTLIER