‘Kōng xiǎng’ literally combines ‘kōng’ (empty, void) and ‘xiǎng’ (to think, imagine), conveying the idea of thinking that is detached from reality — like imagining something desirable but utterly unattainable or impractical. It carries a slightly negative or skeptical connotation, implying wishful, unfounded, or unrealistic mental imagery, unlike neutral terms such as ‘mèngxiǎng’ (aspiration). People often use it to describe daydreams about success, wealth, or romance without any concrete plan or basis.

This word appears frequently in critiques of impractical ideas — for example, in education, politics, or personal development contexts — where someone is accused of indulging in ‘kōng xiǎng’ instead of taking practical action. It’s more formal and critical than casual words like ‘zuò mèng’ (to dream), and rarely used in positive, poetic, or playful registers. Native speakers tend to pair it with verbs like ‘chénjìn’ (to indulge in), ‘yǒu’ (to have), or ‘bìmiǎn’ (to avoid).