Rough or Unrefined:
* Raw: This implies a lack of processing or refinement.
* Unprocessed: This emphasizes that the material is in its natural state.
* Unpolished: This refers to a lack of smoothness or elegance.
* Basic: This describes something simple and fundamental.
* Primitive: This suggests something ancient or undeveloped.
* Unsophisticated: This implies a lack of refinement or sophistication.
Offensive or Vulgar:
* Obscene: This suggests something highly offensive or indecent.
* Indecent: This refers to something that violates standards of decency.
* Vulgar: This implies a lack of taste or refinement in language or behavior.
* Coarse: This describes something that is rough and unrefined in language or manner.
* Unrefined: This implies a lack of polish and sophistication.
Impure or Low Quality:
* Unrefined: This suggests a lack of processing or purification.
* Impure: This refers to something that is contaminated or not pure.
* Inferior: This implies something of lower quality than expected.
* Low-grade: This describes something of poor quality.
* Rough: This suggests something that is not smooth or refined.
Other options:
* Uncouth: This describes someone who is rude or boorish.
* Boorish: This refers to someone who is rude and insensitive.
* Uncultured: This suggests a lack of refinement or education.
To choose the most appropriate synonym, consider the specific context of the word "crude" and the nuance you want to convey.