hugo/docs/content/en/functions/singularize.md

title	description	categories	menu	keywords	signature	relatedfuncs
singularize	Converts a word according to a set of common English singularization rules.	functions	docs parent functions	strings singular	singularize INPUT

{{ "cats" | singularize }} → "cat"

See also the .Data.Singular taxonomy variable for singularizing taxonomy names.