The rare daily word game sweeping the globe. Find what's hidden in plain sight.
PROSTHESIS
Definition of PROSTHESIS
noun
An artificial medical device that replaces a body part, either internal or external.
Wiktionary · CC BY-SA
Where it comes from
Via Latin, from Ancient Greek πρόσθεσις (prósthesis, “addition”), from προστίθημι (prostíthēmi, “to add”), from πρός (prós, “towards”) + τίθημι (títhēmi, “to place”), from Proto-Indo-European *próti, *préti + *dʰédʰeh₁ti (“to be putting, to be placing”). By surface analysis, prosth- + -esis.
Etymology via Wiktionary (CC BY-SA).
Word DNA
Line of descent
3 recorded generations before English.
Deepest traced root
2nd
of 59 source languages in OUTLIER
14.2%
of traced words share this origin (11,895)
How it is built
Every Proto-Indo-European word → · The Word DNA of OUTLIER →
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
PROSTHESIS in OUTLIER
Players have found it on 1 board so far.
It first turned up on Day 162, 29 October 2026. Nobody has seen it on a board for 9 days.
First ever to find it
on Day 162, 29 October 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
PROSTHESIS starts with P and ends with S. Sorted, its letters read EHIOPRSSST - the shape to hunt for when the grid is scrambled. S appears more than once.
Same letters, different word
2 other words use exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Words that start PROSTH
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found PROSTHESIS?
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 162 - and most players walked straight past it.
Play today's OUTLIER