The rare daily word game sweeping the globe. Find what's hidden in plain sight.
PETROLEUM
Definition of PETROLEUM
noun
A flammable liquid ranging in color from clear to very dark brown and black, consisting mainly of hydrocarbons, occurring naturally in deposits under the Earth's surface.
Wiktionary · CC BY-SA
Where it comes from
Learned borrowing from Medieval Latin petroleum. Doublet of petrol.
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 (23,981)
branch · 30.7% of traced words
How it is built
Same root, PETROLEUM · 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.
PETROLEUM in OUTLIER
Players have found it on 34 boards so far. 58 players have found it across Outlier's history.
It first turned up on Day 12, 1 June 2026. The most recent board was Day 154, 21 October 2026. Nobody has seen it on a board for 4 days.
First found by a player on Day 12, 1 June 2026.
Built from these letters
PETROLEUM starts with P and ends with M. Sorted, its letters read EELMOPRTU - the shape to hunt for when the grid is scrambled. E appears more than once.
Words that start PETROL
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 12
Could you have found PETROLEUM?
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 12 - and most players walked straight past it.
Play today's OUTLIER