The rare daily word game sweeping the globe. Find what's hidden in plain sight.

HYDRATION

/haɪˈdɹeɪʃən/9 letters

Definition of HYDRATION

noun

The incorporation of water molecules into a complex with those of another compound.

Wiktionary · CC BY-SA

Where it comes from

From hydrate + -ion. The programming terms come from the concept of data lake.

Etymology via Wiktionary (CC BY-SA).

Word DNA

How it is built

noun3 syllablescompound-ion

Same root, HYDRATION · 1 relative in the game

The Word DNA of OUTLIER →

Rarity score
Withheld
Revealed only in play
Tier
Withheld
Find it yourself

OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.

HYDRATION in OUTLIER

Players have found it on 51 boards so far. 89 players have found it across Outlier's history.

Day 1Day 144
Its 51 boards, across 144 finished boards · taller bars are busier boards
51
Boards found on
16
First board
142
Latest board
8
Longest gap, days

It first turned up on Day 16, 5 June 2026. The most recent board was Day 142, 9 October 2026. Nobody has seen it on a board for 2 days.

First found by a player on Day 16, 5 June 2026.

Built from these letters

HYDRATION
9
Letters
3
Vowels
6
Consonants
9
Different letters
4
Longest consonant run
2
Longest vowel run

HYDRATION starts with H and ends with N. Sorted, its letters read ADHINORTY - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.

Words that start HYDRAT

Its neighbours in the OUTLIER dictionary - shortest first.

Could you have found HYDRATION?

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 16 - and most players walked straight past it.

Play today's OUTLIER