Playful in an appealingly bold way:
— A roguish grin.

synonyms: devilish, rascally.

Roget 840: amusing, entertaining, diverting etc. v.; recreational, recreative, lusory^†; pleasant etc. (pleasing) 829; laughable etc. (ludicrous) 853; witty etc. 842; fun, festive, festal; jovial, jolly, jocund, roguish, rompish^†; playful, playful as a kitten; sportive, ludibrious^†.    funny; very funny, hilarious, uproarious, side-splitting.    amused etc. v.; pleased with a rattle, tickled with a pleased with a rattle, tickled with a straw" [Pope]; laughing etc. v.; risible; ready to burst, ready to split, ready to die with laughter; convulsed with laughter, rolling in the aisles.    ... show more

Polish: łobuzerski, szelmowski, łotrzykowski

Lacking principles or scruples:
— The captain was set adrift by his roguish crew.

synonyms: blackguardly, rascally, scoundrelly.

Polish: drański, łajdacki