The rare daily word game sweeping the globe. Find what's hidden in plain sight.
OPERCULUM
Definition of OPERCULUM
noun
A covering flap in animals and insects, such as a gill cover or the lid of nits.
Wiktionary · CC BY-SA
Where it comes from
Borrowed from Latin operculum.
Etymology via Wiktionary (CC BY-SA).
Word DNA
Line of descent
- Latin
- English
One recorded step before English.
Deepest traced root
1st
of 59 source languages in OUTLIER
30.7%
of traced words share this origin (23,914)
branch · 30.7% of traced words
How it is built
Same root, OPERCULUM · 4 relatives 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.
OPERCULUM in OUTLIER
Players have found it on 10 boards so far. 11 players have found it across Outlier's history.
It first turned up on Day 31, 20 June 2026. The most recent board was Day 142, 9 October 2026. Nobody has seen it on a board for 13 days.
First ever to find it
on Day 31, 20 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
OPERCULUM starts with O and ends with M. Sorted, its letters read CELMOPRUU - the shape to hunt for when the grid is scrambled. U appears more than once.
Words that start OPERCU
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 31
Could you have found OPERCULUM?
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 31 - and most players walked straight past it.
Play today's OUTLIER