IPA: /ˈlaɪkliər/
KK: /ˈlaɪkliər/
More probable or expected to happen than something else.
It is likelier to rain today than it was yesterday.
Likelier → It is formed from "like" (from Old English "lician", meaning to be pleasing or agreeable) and the comparative suffix "-lier" (meaning more). The word "likelier" means more likely or more probable to happen.
Think of something that is 'pleasing' or 'agreeable' ('like') and remember that 'likelier' means it is more probable to occur.