Words from
curtail
    (often be curtailed) reduce in extent or quantity; impose a restriction on.
    
    Source: My old website
    
    unscrupulous
    having or showing no moral principles; not honest or fair.
    
    Source: My old website
    
    pernicious
    having a harmful effect, esp. in a gradual or subtle way.
    
    Source: My old website
    
    obfuscate
    render obscure, unclear, or unintelligible.
    
    Source: My old website