‘妄想’ literally combines 妄 (wàng), meaning ‘reckless’, ‘unfounded’, or ‘without basis’, and 想 (xiǎng), meaning ‘to think’ or ‘to imagine’. Together, it denotes a thought or belief that is unrealistic, irrational, or detached from reality — essentially a delusion. As a noun, it refers to such a false belief (e.g., believing one has supernatural powers without evidence). As a verb, it means ‘to delude oneself’ or ‘to entertain baseless hopes’.

The word carries a distinctly negative, clinical, or critical connotation. It’s commonly used in psychological contexts (e.g., ‘delusional disorder’), but also appears in everyday speech to gently or sharply criticize unrealistic ambitions — like dreaming of instant fame without effort, or expecting a promotion after one week on the job. It implies a lack of grounding in fact or reason, not mere optimism or imagination.