noun
bustle; liveliness; prosperity
Describes a place or event full of people, activity, and energy. Often used for festivals, shopping streets, or busy public spaces.
祭りの日は町中が賑わいを見せた。
On the day of the festival, the whole town was bustling.
商店街の賑わいが戻ってきた。
The liveliness of the shopping street has returned.
賑やか is a na-adjective meaning 'lively' or 'bustling', used to describe a place or atmosphere. 賑わい is a noun referring to the state of being bustling or the crowd itself.
活気 means 'energy' or 'vitality' and can apply to people, places, or activities. 賑わい specifically implies a crowd and a lively atmosphere, often in a commercial or festive setting.
Derived from the verb 賑わう (to be crowded, to prosper). The noun form 賑わい refers to the resulting state of bustle or prosperity.