the.com/plural
One was never enough, so grammar invented a way to admit it.
means The grammatical form of a word that refers to more than one of something, as opposed to the singular.
from From Latin pluralis, 'of or belonging to more than one,' built on plus (genitive pluris), meaning 'more.' It traveled into English through Old French plurel, and that same Latin plus still surfaces in everyday words like plus, surplus, and plenty — all quietly insisting that more exists.
weird formsOx becomes oxen; box stays defiantly boxes
latin ghostsCactus, cacti; octopus prefers octopuses, not octopi
zero countMany languages skip plurals entirely, using context instead
royal weMonarchs pluralize themselves to sound bigger than one
sheep problemSome words refuse to change for any number