roguish

adjectives

playful in an appealingly bold way
"a roguish grin"
devilish, rascally, roguish
is derived from
roguishness
lacking principles or scruples
"the rascally rabble"; "the tyranny of a scoundrelly aristocracy" - W.M. Thackaray; "the captain was set adrift by his roguish crew"
blackguardly, rascally, roguish, scoundrelly
is derived from
roguishness