The rare daily word game sweeping the globe. Find what's hidden in plain sight.
SEMIGROUP
Definition of SEMIGROUP
noun
Any set for which there is a binary operation that is closed and associative.
Wiktionary · CC BY-SA
Where it comes from
From semi- + group, reflecting the fact that not all the conditions required for a group are required for a semigroup. (Specifically, the requirements for the existence of identity and inverse elements are omitted.)
Etymology via Wiktionary (CC BY-SA).
OUTLIER scores every word on how unusual it is, and that number is not published. Working it out at the board is the game.
SEMIGROUP in OUTLIER
Players have found it on 3 boards so far.
It first turned up on Day 15, 4 June 2026. The most recent board was Day 105, 2 September 2026. Nobody has seen it on a board for 15 days.
First ever to find it
on Day 15, 4 June 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
SEMIGROUP starts with S and ends with P. Sorted, its letters read EGIMOPRSU - the shape to hunt for when the grid is scrambled. No letter is used twice, which makes it an isogram.
Words that start SEMIGR
Its neighbours in the OUTLIER dictionary - shortest first.
Also seen on Day 15
Could you have found SEMIGROUP?
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 15 - and most players walked straight past it.
Play today's OUTLIER