What is the meaning of すぐ?

straight, not bent

直ぐ: immediately, right away, soon

直ぐ: quick to

直ぐ: right next to, right close by

挿ぐ: classical form of modern 挿げる (sugeru, “to connect or affix one thing to another, especially by passing something through something else”)

imperfective and stem (or continuative) forms of すぐる (suguru) [ichidan]

直ぐ: immediately

Source: wiktionary.org