The rare daily word game sweeping the globe. Find what's hidden in plain sight.
ARCSINE
Definition of ARCSINE
noun
Any of several single-valued or multivalued functions that are inverses of the sine function. Symbol: arcsin, sin
Wiktionary · CC BY-SA
Where it comes from
From arc- + sine.
Etymology via Wiktionary (CC BY-SA).
Word DNA
How it is built
Same root, ARCSINE · 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.
ARCSINE in OUTLIER
Players have found it on 31 boards so far. 34 players have found it across Outlier's history.
It first turned up on Day 72, 31 July 2026. The most recent board was Day 160, 27 October 2026. Nobody has seen it on a board for 1 day.
First ever to find it
on Day 72, 31 July 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
ARCSINE starts with A and ends with E. Sorted, its letters read ACEINRS - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Same letters, different word
3 other words use exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Could you have found ARCSINE?
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 72 - and most players walked straight past it.
Play today's OUTLIER