IPA: /ˌsuːpərkəˈlɒsəl/
KK: /suːpərkəˈlɑsəl/
Extremely large or great in size, amount, or degree.
The supercolossal statue towered over the city, attracting tourists from all around.
Supercolossal → It is formed from "super-" (meaning above or beyond) and "colossal" (from Greek "kolossos", meaning giant or statue). The word "supercolossal" means something that is extraordinarily large or beyond colossal in size.
Think of something that is 'above' ('super-') a 'giant' ('colossal') — that's why supercolossal means extraordinarily large.
No commonly confused words.