English
squareful
From square + -ful.
Formed from square + -ful
Proto-Indo-European *kʷetwṓr ‘four’
…
Vulgar Latin *exquadrō
Vulgar Latin *exquadra
Old French esquarre ‘square’
Middle English square ‘a square’
English square
Today it means
adj Synonym of powerful (“being a powerful number”).
Language periods are conventional ranges, not dates for this word.
Etymograph / squareful