IPA: /ˈlʌkɪli/
KK: /ˈlʌkɪli/
In a way that is fortunate or brings good luck.
Luckily, I found my keys just before I left the house.
Luckily → It is formed from "luck" (from Middle Dutch *luk*, meaning fortune or chance) and the suffix "-ily" (meaning in a manner). The word "luckily" means in a manner that is fortunate or by chance.
Think of 'luck' as fortune and remember that 'luckily' means something happens in a fortunate way.