unrestrainable (adjective) irrepressible: effervescent, vivacious
Sinonime: boisterous, bubbling,
buoyant,
ebullient,
enthusiastic, insuppressible,
rebellious, rhapsodical,
tumultous/tumultuous, unconstrained, uncontainable,
uncontrollable, unmanageable, unquenchable, unrestrainable,
unrestrained,
unruly, unstoppable
Antonime: depressed,
despondent,
grave,
hopeless,
serious