"unbridled" in the verb sense
1. unbridle
remove the bridle from (a horse or mule)
"unbridled" in the adjective sense
1. unbridled, unchecked, uncurbed, ungoverned
not restrained or controlled
"unbridled rage"
"an unchecked temper"
"ungoverned rage"
Source: WordNet® (An amazing lexical database of English)
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