回 húi

• 回家 (húi jiā) Return home
• 回想 (húi xiǎng) Recall Literal. Return (to a point in time) and think
• 回忆 (húi yì) Memories / Recollect Literal. Return (to a point in time) and remember

• 回音 (huí yīn) Echo Literal. Response sound
• 回信 (huí xìn) Reply Literal. Response letter
• 回复邮件 Reply an email

For episodes in life and literature

• 上回 (shàng huí) Previously Previous round of event
• 下回 (xià huí) Next time Following round of event
• 那是两回事 (nà shì liǎng huí shì) That is a separate matter Those are two rounds of matter
• 第三十六回 (dì sān shí liù huí) Chapter 36 Literal. The 36th round of story

Compound characters with 囗 Enclosure Radical are usually associated with an area or a compound

• 囚 (qiú) Trapped Symbolically. Person within four walls
• 国 (guó) Country Symbolic. Jade (treasure) kept within borders
• 图 (tú) Picture / Painting Symbolic. Winter (imagery) in a frame
• 圆 (yuán) Round Symbolic. Member(s) at the table