IPA: //ˈblæɡɑrdɪzəm//
KK: /ˈblæɡɑrdɪzəm/
Behavior or language that is dishonest, immoral, or contemptible.
His blackguardism was evident in the way he treated his colleagues.
Blackguardism is formed from "blackguard" (from Old French *blacard*, meaning a scoundrel or rascal) and the suffix "-ism" (meaning a practice or belief). The term refers to the practice or belief associated with being a scoundrel or behaving in a dishonorable manner.
Think of a 'blackguard' as someone who behaves dishonorably, and '-ism' indicates a practice or belief. This helps you remember that 'blackguardism' refers to the practice of scoundrel-like behavior.
No commonly confused words.