The rare daily word game sweeping the globe. Find what's hidden in plain sight.
CARDIO
Definition of CARDIO
adjective
Cardiovascular; pertaining to the health of the circulatory and respiratory systems.
Wiktionary · CC BY-SA
Where it comes from
Clipping of cardiovascular.
Etymology via Wiktionary (CC BY-SA).
Word DNA
How it is built
Same root, CARDIO · 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.
CARDIO in OUTLIER
Players have found it on 30 boards so far. 34 players have found it across Outlier's history.
It first turned up on Day 23, 12 June 2026. The most recent board was Day 144, 11 October 2026. Nobody has seen it on a board for 4 days.
First found by a player on Day 23, 12 June 2026.
Built from these letters
CARDIO starts with C and ends with O. Sorted, its letters read ACDIOR - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Words that start CARDIO
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 23
Could you have found CARDIO?
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 23 - and most players walked straight past it.
Play today's OUTLIER