The rare daily word game sweeping the globe. Find what's hidden in plain sight.
ENDOTHERMIC
Definition of ENDOTHERMIC
adjective
Of a chemical reaction that absorbs heat energy from its surroundings.
Wiktionary · CC BY-SA
Where it comes from
Borrowed from French endothermique, from endo- (“inside”) + thermique (“of heat”), both ultimately from Ancient Greek. By surface analysis, endo- + -thermic.
Etymology via Wiktionary (CC BY-SA).
Word DNA
Line of descent
- Ancient Greek
- French
- English
2 recorded generations before English.
Deepest traced root
3rd
of 59 source languages in OUTLIER
12.2%
of traced words share this origin (9,601)
branch · 12.2% of traced words
How it is built
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
ENDOTHERMIC in OUTLIER
Players have found it on 60 boards so far. 225 players have found it across Outlier's history.
It first turned up on Day 20, 9 June 2026. The most recent board was Day 158, 25 October 2026. Nobody has seen it on a board for 1 day.
First ever to find it
on Day 20, 9 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
ENDOTHERMIC starts with E and ends with C. Sorted, its letters read CDEEHIMNORT - the shape to hunt for when the grid is scrambled. E appears more than once.
Words that start ENDOTHE
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 20
Could you have found ENDOTHERMIC?
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 20 - and most players walked straight past it.
Play today's OUTLIER