IPA: /ʌnˈlʌkiər/
KK: /ʌnˈlʌkiər/
Having less good fortune than someone else or compared to a previous situation.
After losing the game, he felt even unluckier than before.
Unluckier → It is formed from "un-" (meaning not) and "lucky" (from Middle English *lucki*, meaning fortunate or favored). The suffix "-ier" indicates a comparative form. Therefore, "unluckier" means not lucky to a greater degree than someone else.
Think of 'not' ('un-') being added to 'lucky' to show that someone is more unfortunate than another. This helps you remember that 'unluckier' means someone who is less fortunate.