IPA: //ˈblækɡɑrd//
KK: /ˈblækˌɡɑrd/
A person who behaves in a dishonest or immoral way; someone who is rude or untrustworthy.
He was known as a blackguard for his deceitful actions and harsh words.
To verbally insult or criticize someone harshly.
He blackguarded his opponent during the debate, using harsh words to attack his character.
Past: blackguarded
Past Participle: blackguarded
Blackguard is formed from "black" (from Old English "blæc", meaning dark or without light) and "guard" (from Old French "garde", meaning to watch over or protect). The term originally referred to a person of low status or a scoundrel, implying someone who is dark in character or behavior.
Think of 'black' representing something dark or negative, and 'guard' as someone who watches over — together, they describe a person of questionable character.
No commonly confused words.