arätö = rule (noun) (some things Google found for "arato": a common term; an uncommon last name; an unusual generally masculine first name; Arato Castle in Japan; character Arato Endo in dystopia manga Beatless; in Hungarian similar arató means reaper, harvester; in Italian a form of the verb to plough or plow; name of places in Spain (Canary Islands), Japan and Mexico)
Word derivation for "rule (regulation)" :
Basque = arau, Finnish = sääntö
Miresua = arätö
I took the opportunity to use an ö (o umlaut) in my Miresua word.
You can find the word rule or rules around ten times in Alice's Adventures in Wonderland.