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

過ぐ: classical form of modern 過ぎる (sugiru, to go through, to go past; to exceed)

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)

直ぐ: immediately

Source: wiktionary.org