How to Use "blackguard" with Example Sentences

1. Even more obscure than blackguard is blackleg " scab , non-unionist . "
2. In modern english , a blackguard is a worthless , contemptible person , so where does guard come in ?
3. Needless to say , attempts to derive blackguard from some foreign language cannot be taken seriously , but I would like to mention a small detail .
4. The collective meaning of the noun gradually disappeared ; today a blackguard is an individual , not a body of people .
5. Other members of the blackguard were link boys ( torch bearers ) , youngsters of ill repute .