The rare daily word game sweeping the globe. Find what's hidden in plain sight.
PROPYLENE
Definition of PROPYLENE
noun
The organic chemical compound propene. An alkene which is a colorless gaseous (at room temperature and pressure) hydrocarbon with the chemical formula C3H6.
Wiktionary · CC BY-SA
Where it comes from
Coined by John Williams Reynolds in 1851, from French propionique + -ylene
Etymology via Wiktionary (CC BY-SA).
Word DNA
Line of descent
- French
- English
One recorded step before English.
Deepest traced root
5th
of 59 source languages in OUTLIER
5.3%
of traced words share this origin (4,388)
branch · 12.8% of traced words
How it is built
Same root, PROPYLENE · 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.
PROPYLENE in OUTLIER
Players have found it on 2 boards so far.
It first turned up on Day 117, 14 September 2026. The most recent board was Day 152, 19 October 2026. Nobody has seen it on a board for 15 days.
First ever to find it
on Day 117, 14 September 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
PROPYLENE starts with P and ends with E. Sorted, its letters read EELNOPPRY - the shape to hunt for when the grid is scrambled. P and E appear more than once.
Words that start PROPYL
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found PROPYLENE?
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 117 - and most players walked straight past it.
Play today's OUTLIER