corrupt crafty crooked deceitful dishonest illegal petty ruthless selfish shady shameless underhanded unethical venal arrant base casuistic conscienceless degraded degrading disgraceful dishonorable exploitative improper low-down mercenary perfidious questionable recreant scandalous scheming self-seeking shifty sinister slippery sly two-faced unconscientious unconscionable underhand unfair unprincipled unworthy wicked wrongful