| serious(adjective, hard, difficult, complex, awkward) |
| toilful(adjective, hard, difficult, complex, awkward) |
| troubled(adjective, hard, difficult, complex) |
| deceptive(adjective, mean, smooth, wrong, fake) |
| dishonest(adjective, mean, smooth, wrong, fake) |
| dodgy(adjective, dishonest, unreliable, untrustworthy, risky) |
| sharp(adjective, mean, smooth, keen, ability) |
| astute(adjective, sharp, intelligent, cunning, clever) |
| touchy(adjective, characteristic, understanding, easy, keen) |
| delicate(adjective, understanding, hard, easy, keen) |
| risky(noun, adjective, difficult, delicate, uncertain) |
| underhand(adjective, mean, smooth, keen, sharp) |
| cagey(adjective, sharp, intelligent, deceitful, clever) |
| canny(adjective, mean, sharp, intelligent, cunning) |
| calculating(adjective, sharp, dishonest, intelligent, cunning) |
| crooked(adjective, mean, smooth, fake, smart) |
| double-dealing(adjective, mean, smooth, wrong, fake) |
| duplicitous(adjective, false, dishonest, deceitful, untrustworthy) |
| smooth(adjective, sharp, intelligent, cunning, clever) |
| subtle(adjective, mean, smooth, false, cunning) |