IPA: /ˌsɛrəˈmoʊniəsli/
KK: /sɛrəˈmoʊniəsli/
In a way that is formal and marked by ceremony, often involving rituals or special attention to detail.
The guests were ceremoniously welcomed with a traditional dance.
Ceremoniously → It is formed from "ceremony" (from Old French *ceremonie*, meaning a formal religious or public occasion) and the suffix "-ously" (meaning in a manner characterized by). The word "ceremoniously" means in a manner that is formal and characterized by ceremony.
Think of a formal occasion ('ceremony') and how it is done in a specific manner ('-ously'). This helps you remember that 'ceremoniously' means to do something in a formal way.