Select the most appropriate synonym of the given word.
Innuendo

The correct answer is Insinuation.

Step-by-step Explanation:
1. Understand the meaning of the given word:
An innuendo is an indirect, oblique, or suggestive remark or hint, typically one that is disparaging, derogatory, or mocking in nature.
Example: "She offered a damaging innuendo about her colleague's professional capabilities."

2. Analyze the options:
- Crude: This refers to something in a natural or raw state, or something that is vulgar, rude, or makeshift. It does not carry the meaning of an indirect hint.
- Prose: This is written or spoken language in its ordinary form, without metrical structure (as opposed to poetry). This is unrelated to hints or suggestions.
- Ragged: This describes something torn, frayed, or having rough edges. It is unrelated to communication or hints.
- Insinuation: An insinuation is an unpleasant hint or suggestion of something bad, made in an indirect or subtle way. This matches the definition of "innuendo" perfectly.

3. Conclusion:
Since both "innuendo" and "insinuation" refer to an indirect or sly suggestion (often negative), they are synonyms. Therefore, Insinuation is the most appropriate synonym.