This is the 1147th most frequent Japanese word.
出す
"出す" means "to take out," "to put out," or "to submit."
Here, 出す is used to mean 'to take out' an object from somewhere, often implying a physical action.
彼はバッグから本を出した。
He took a book out of the bag.
In this sentence, 出す is used metaphorically to mean 'to release' or 'to launch' something into a domain, such as a market.
彼女は新しい製品を市場に出した。
She launched a new product into the market.
Here, the word 出す is used within a compound form 吠え出す, meaning 'to start an action,' reflecting the onset of barking.