sinker

🇬🇧/ˈsɪŋkə(r)/ 🇺🇸/ˈsɪŋkər/ 17
You can use hook, line, and sinker to emphasize that someone is tricked or forced into a situation completely. 完全地; 毫无保留地

noun [专属名词]铅锤;铅坠;[矿业]凿井工;下沉的人

We fell for it hook, line, and sinker. 我们对它完全是一见倾心。