secure something against (someone, something, or an animal)
1. to fasten something against the entry of someone, an animal, or something. Jane secured the doors and windows against the prowler who was roving around the neighborhood. You had better secure the henhouse against coyotes.
2. to obtain a legal order involving someone or something. I secured an injunction against Harry. If he bothers you again, he'll have to go into court to explain himself. We can't secure an injunction against this ruling.