not bred or mated, as a stock animal; not yet bred
An unbred cow gives no milk
Word origin
[1590–1600; un-1 + bred]This word is first recorded in the period 1590–1600. Other words that entered Englishat around the same time include: attack, class, dummy, squeeze, volunteerun- is a prefix meaning “not,” freely used as an English formative, giving negative oropposite force in adjectives and their derivative adverbs and nouns (unfair; unfairly; unfairness; unfelt; unseen; unfitting; unformed; unheard-of; un-get-at-able), and less freely used in certain other nouns (unrest; unemployment)