The rare daily word game sweeping the globe. Find what's hidden in plain sight.
TETRABASIC
Definition of TETRABASIC
adjective
containing four replaceable hydrogen atoms
Wiktionary · CC BY-SA
Where it comes from
From tetra- + basic.
Etymology via Wiktionary (CC BY-SA).
Word DNA
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.
TETRABASIC in OUTLIER
Players have found it on 1 board so far.
It first turned up on Day 138, 5 October 2026. Nobody has seen it on a board for 1 day.
First ever to find it
on Day 138, 5 October 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
TETRABASIC starts with T and ends with C. Sorted, its letters read AABCEIRSTT - the shape to hunt for when the grid is scrambled. T and A appear more than once.
Words that start TETRAB
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found TETRABASIC?
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 138 - and most players walked straight past it.
Play today's OUTLIER