burly; strong; indomitable; indefatigable; robust (vitality, appetite, economic growth, etc.); strong
recalcitrant; insubordinate; lawless; disaffected; malcontent; rebellious
lawless people; gang; malcontents; recalcitrants
to give rein to (imagination)
to give rein to (imagination); to lend wings to (fancy); to rage with all one's force; to be rampant
aggressively business-minded; shrewd (of a merchant, salesman, etc.)