脑海

• Pinyin: nǎo hǎi
• Hanzi breakdown: 脑 = 月(flesh radical) + brain-related components — the brain/skull; 海 = 氵(water) + 每(every/always, phonetic) — sea, vast body of water

Meaning

The mind; one's mental space; the inner realm of memory, imagination, and thought — depicted as a vast sea.

A literary and evocative word for the mind, emphasising its depth like the sea. Common in writing and emotional expression. Typically appears in phrases like 在脑海中 (in one's mind) or 浮现在脑海 (appear in the mind's eye).

Examples

1. 多年过去了，那个傍晚的画面仍然清晰地浮现在她的脑海中，挥之不去。 Even after all these years, that evening still appears vividly in her mind and won’t go away.
2. 演讲前他在脑海中反复排练每一个细节，力求在台上做到万无一失。 Before the speech, he rehearsed every detail over and over in his mind, determined to make everything foolproof on stage.
3. 导演说，这部电影的雏形早在十年前就已经在脑海中成形，只是一直等待合适的时机。 The director said the basic idea for this film had already taken shape in his mind ten years ago; he was just waiting for the right moment.

Usage Guide

Context: literary expression, memory, imagination, emotional writing

Tone: reflective/evocative

Do Say

• 即便时隔多年，那段岁月中的每一个细节仍然鲜活地保存在她的脑海深处，从未真正褪色。(Even years later, every detail of that period of her life remains vividly preserved in the depths of her mind, never truly fading.)
• 他闭上眼睛，在脑海中仔细勾勒出整个方案的蓝图，然后才拿起笔开始把它落实到纸上。(He closed his eyes and carefully traced the blueprint of the entire plan in his mind before picking up a pen to commit it to paper.)

Don't Say

• 用'脑海'指代实际的大脑器官 — 脑海 refers to the metaphorical mind/mental space; for the physical organ, use 大脑 or 脑部

Origin & History

脑(brain) + 海(sea/ocean). A poetic compound depicting the mind as a vast and deep sea of thought and memory.

Cultural Context

Generation: All ages

Social background: Universal