"Cooperative" is a meaning of the word "accommodating". Specifically, the word generally functions as an adjective or a verb form. As an adjective, it means that someone or something is cooperative, helpful, obliging. As a verb, it relates to the act of cooperating, helping, obliging.
To understand the symbolic meaning of figurative language, one has to first understand the literal meaning. It is often helpful to break down phrases into their word-meanings first, then combine the word-meanings to understand the symbolic meaning in the figurative language.