The rare daily word game sweeping the globe. Find what's hidden in plain sight.
SISTER
Definition of SISTER
noun
A daughter of the same parents as another person; a female sibling.
Wiktionary · CC BY-SA
Where it comes from
Inherited from Middle English suster, from Old English sweostor, from Proto-West Germanic *swester, from Proto-Germanic *swestēr, from Proto-Indo-European *swésōr. Doublet of soror. Cognate with Scots sister, syster (“sister”), West Frisian sus, suster (“sister”), Dutch zuster (“sister”), German Schwester (“sister”), Norwegian Bokmål søster (“sister”), Norwegian Nynorsk and Swedish syster (“sister”), Icelandic systir (“sister”), Gothic 𐍃𐍅𐌹𐍃𐍄𐌰𐍂 (swistar, “sister”), Latin soror (“sister”), Russian сестра́ (sestrá, “sister”), Lithuanian sesuo (“sister”), Albanian vajzë (“girl, maiden”), Sanskrit स्वसृ (svásṛ, “sister”), Persian خواهر (xâhar, “sister”). In standard English, the form with i is due to contamination with Old Norse systir (“sister”). The plural sistren is from Middle English sistren, a variant plural of sister, suster (“sister”); compare brethren. The sense for "Adelpha-genus butterfly" is a semantic loan from translingual Adelpha, itself from Ancient Greek ἀδελφή (adelphḗ, “sister”).
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.
SISTER in OUTLIER
Players have found it on 1 board so far.
It first turned up on Day 90, 18 August 2026. Nobody has seen it on a board for 33 days.
First ever to find it
on Day 90, 18 August 2026 - before anyone else in Outlier's history. See the Pioneers
Built from these letters
SISTER starts with S and ends with R. Sorted, its letters read EIRSST - the shape to hunt for when the grid is scrambled. S appears more than once.
Same letters, different word
4 other words use exactly these letters. Worth knowing at the board: an anagram fits a grid the same way.
Words that start SISTER
Its neighbours in the OUTLIER dictionary - shortest first.
Could you have found SISTER?
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 90 - and most players walked straight past it.
Play today's OUTLIER