IPA: /ʌnˈlaɪkli/
KK: /ʌnˈlaɪkli/
Not likely to happen or occur; something that is improbable or has a low chance of happening.
It is unlikely that it will rain tomorrow, so we can plan our picnic.
Unlikely → It is formed from "un-" (meaning not) and "likely" (from Old English "liclic", meaning having the characteristics of). The word "unlikely" means not having the characteristics of being probable or expected.
Think of 'not' ('un-') and 'having the characteristics of' ('likely') to remember that 'unlikely' means something that is not probable.