IPA: /rʌmˈbʌstʃəsli/
KK: /rʌmˈbʌstʃəsli/
In a lively and noisy way, often causing trouble or excitement.
The children played rumbustiously in the park, laughing and shouting.
Rumbustiously → It is derived from the word 'rumbustious' (of uncertain origin, possibly from a combination of 'rumbust' and the suffix '-ious'). The term 'rumbust' is thought to be a dialectal variant of 'rumbustious', meaning boisterous or unruly. The suffix '-ious' indicates a quality or state. Therefore, 'rumbustiously' describes an action done in a boisterous or unruly manner.
Think of 'rumbustious' as describing someone who is full of energy and unruliness, and the '-ious' ending helps you remember that it relates to a quality of being lively and chaotic.