酷似 (kùsì) is an adjective meaning 'uncannily similar' or 'strikingly alike' — emphasizing a resemblance so close it feels almost eerie or remarkable. The character 酷 (kù) originally means 'cool' or 'severe', but here functions as an intensifier, similar to 'extremely' or 'uncannily'. The character 似 (sì) means 'to resemble' or 'to be like'. Together, they form a fixed two-character compound that describes visual, behavioral, or structural similarity that goes beyond ordinary likeness — often used when comparing people, animals, objects, or even abstract qualities.

This word is commonly found in descriptive writing, journalism, and everyday speech when highlighting surprising parallels — for example, a child who looks exactly like a parent, or a rescued stray dog that bears an uncanny resemblance to a famous breed. It carries a slightly literary or formal tone but remains widely understood and used in modern spoken and written Chinese.