rascal
Concise Oxford English Dictionary © 2008 Oxford University Press:
rascal/ˈrɑːskl/
▶noun a mischievous or impudent person, especially a child.
■ a dishonest or untrustworthy man.
– derivatives
rascality noun (pl. rascalities),
rascally adjective.
rascality noun (pl. rascalities),
rascally adjective.
– origin ME (in the senses ‘a mob’ and ‘member of the rabble’): from OFr. rascaille ‘rabble’, of uncertain origin.
'rascal' also found in these Oxford entries:

