IPA: /ræmˈbʌŋkʃəsli/
KK: /ræmˈbʌŋkʃəsli/
In a way that is noisy, energetic, and difficult to control.
The children played rambunctiously in the park, laughing and running around.
Rambunctiously → The word is derived from 'rambunctious' (of uncertain origin, possibly a blend of 'rambunctious' and 'tumultuous'), with the suffix '-ly' (meaning in a manner of). The term describes behaving in a noisy, energetic, and disorderly way.
Think of someone acting in a noisy and energetic manner, which is what 'rambunctiously' describes.