• Basic forms
• 囲む — to surround; to encircle / base form
• 囲みます — surround / masu form
• 囲んだ — surrounded / ta form
• 囲んで — surround and … / te-form
• 囲まない — do not surround / negative
• 囲めば — if (you) surround / conditional
• 囲め・囲みなさい — surround it! / imperative
• Common expressions
• 人々に囲まれる — be surrounded by people
• テーブルを囲む — gather around a table
• 山に囲まれた町 — a town surrounded by mountains
• More
• 囲みたい — want to surround / 〜たい form
• 囲める — can surround / potential
• 囲めない — cannot surround / negative potential
• 囲もう — let’s surround / 〜よう form
• 囲まなかった — didn’t surround / past negative
• 囲んでいる — is surrounding / progressive

囲む（かこむ） is a godan verb ending in む. Used for physically surrounding things or people, and also for “gather around” (テーブルを囲む).

• Basic forms
• 囲う — to enclose; to shelter; to keep / base form
• 囲います — enclose; shelter / masu form
• 囲った — enclosed; sheltered / ta form
• 囲って — enclose and … / te-form
• 囲わない — do not enclose / negative
• 囲えば — if (you) enclose / conditional
• Common expressions
• 塀で囲う — enclose with a fence or wall
• 犬を囲う — keep a dog (in a pen)
• 人を囲う — keep someone under one’s protection or patronage
• More
• 囲いたい — want to enclose / 〜たい form
• 囲える — can enclose / potential
• 囲おう — let’s enclose / 〜よう form
• 囲っている — is keeping or sheltering / progressive

囲う（かこう） is a godan verb ending in う. It often implies enclosing for protection, control, or shelter, rather than simply surrounding.