The rare daily word game sweeping the globe. Find what's hidden in plain sight.
PERFIDIOUS
Definition of PERFIDIOUS
adjective
Of, pertaining to, or representing perfidy; disloyal to what should command one's fidelity or allegiance.
Wiktionary · CC BY-SA
Where it comes from
From Latin perfidiōsus (“treacherous”), from perfidia. By surface analysis, perfidy + -ous.
Etymology via Wiktionary (CC BY-SA).
Word DNA
Line of descent
- Latin
- English
One recorded step before English.
Deepest traced root
1st
of 59 source languages in OUTLIER
30.5%
of traced words share this origin (24,890)
branch · 30.5% of traced words
How it is built
Same root, PERFIDIOUS · 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.
PERFIDIOUS in OUTLIER
Players have found it on 67 boards so far. 490 players have found it across Outlier's history.
It first turned up on Day 19, 8 June 2026. The most recent board was Day 163, 30 October 2026. Nobody has seen it on a board for 2 days.
First ever to find it
on Day 19, 8 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
PERFIDIOUS starts with P and ends with S. Sorted, its letters read DEFIIOPRSU - the shape to hunt for when the grid is scrambled. I appears more than once.
Words that start PERFID
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 19
Could you have found PERFIDIOUS?
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 19 - and most players walked straight past it.
Play today's OUTLIER