Origin: Latin suffix -ous
Robustious has 2 different meanings across 1 category:
noisy and lacking in restraint or discipline
"a boisterous crowd"
"a social gathering that became rambunctious and out of hand"
"a robustious group of teenagers"
"beneath the rumbustious surface of his paintings is sympathy for the vulnerability of ordinary human beings"
"an unruly class"
boisterous