Meaning of “breed” - Learner’s Dictionary

breed

verb uk us /briːd/ (past tense and past participle bred /bred/)

[ I ] If animals breed, they produce young animals.

breed chickens/horses/rabbits, etc
breed contempt/ignorance, etc

to cause something to develop, especially something bad

(Definition of “breed verb” from the Cambridge Learner’s Dictionary © Cambridge University Press)