amoral conscienceless corrupt corrupted criminal crooked dark devious dishonest dishonorable doubtful dubious evasive felonious fishy fraudulent ill-got ill-gotten immoral inaccurate indirect inexact insidious not kosher questionable rotten shady shameless shifty sinister slippery suspicious tricky unconscienced unconscionable uncritical underhand underhanded unethical unexacting unfinical unfussy unmeticulous unpainstaking unparticular unprecise unprincipled unpunctilious unpunctual unrigorous unsavory unscrupulous unstraightforward without remorse without shame