Rambunctious means boisterous and hard to control. A rambunctious child, rambunctious puppies, a rambunctious crowd.
It is affectionate rather than critical and belongs to children and animals, where the energy is expected. It is a chiefly American reshaping of rumbustious, which is the older British word for the same thing.
1adjectiverambunctiousBoisterous and hard to control.
“The rambunctious boys knocked over a vase while chasing each other around the house.”
rambunctious is a quality.
An American variant of rumbustious, itself probably an alteration of robustious.
Built from
A variant of rumbustious (“boisterous and unruly”).
Etymology from Wiktionary, CC BY-SA