To breed may mean to bring forth, swarm, abound, or produce abundantly. The term also occurs in a passage where manna became alive with worms, expressing the spoilage of God’s provision when it was selfishly hoarded.
Exodus 16:20 says that hoarded manna became infested. Genesis uses the word for swarming and abundant reproduction, while Deuteronomy applies it to descendants or young animals.
The entry also notes that an occurrence traditionally rendered “breed” in Zechariah 2:9 is better understood as “field” or “possession of nettles.”