The rare daily word game sweeping the globe. Find what's hidden in plain sight.
APTERIUM
Definition of APTERIUM
noun
An area of bare (featherless) skin on a bird.
Wiktionary · CC BY-SA
Where it comes from
From a- + Ancient Greek πτερόν (pterón, “feather”) + -ium. Compare Ancient Greek ἄπτερος (ápteros, “featherless”).
Etymology via Wiktionary (CC BY-SA).
Word DNA
Line of descent
- Ancient Greek
- English
One recorded step before English.
Deepest traced root
3rd
of 59 source languages in OUTLIER
12.4%
of traced words share this origin (10,280)
branch · 12.4% of traced words
How it is built
Same root, APTERIUM · 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.
APTERIUM in OUTLIER
Players have found it on 9 boards so far.
It first turned up on Day 72, 31 July 2026. The most recent board was Day 158, 25 October 2026. Nobody has seen it on a board for 8 days.
First ever to find it
on Day 96, 24 August 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
APTERIUM starts with A and ends with M. Sorted, its letters read AEIMPRTU - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Words that start APTERI
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found APTERIUM?
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