unrestrained
un-re-strained
adjective
Not limited or controlled; freely expressing strong feelings or actions.
"Her unrestrained enthusiasm was infectious."
Thesaurus
Synonyms: exuberant, highflying, freewheeling, unlaced, unhampered, ungoverned, uncurbed, unhindered, excessive, extravagant, unchecked, unbuttoned
Antonyms: restrained