Explanation:

Graceful is an adjective that describes someone or something that possesses elegance, poise, and smoothness in their actions or movements. It suggests a sense of beauty and refinement. In the given options, the correct answer is option 'D', which is "Awkward". Let's understand why this is the correct answer by analyzing the other options and their meanings:

Rough:
- The opposite of graceful, rough describes something that lacks refinement and is characterized by unevenness or coarseness.
- It implies a lack of smoothness, finesse, or elegance in actions or movements.
- For example, a person with rough movements would be the opposite of someone who is graceful.

Expert:
- Expert refers to someone who has specialized knowledge or skill in a particular field.
- While experts can be graceful in their domain, being an expert does not necessarily mean being graceful in actions or movements.
- Therefore, this option is not the correct answer.

Miserable:
- Miserable means extremely unhappy, wretched, or full of distress.
- It is unrelated to the concept of gracefulness and does not describe elegance or poise in actions or movements.
- Therefore, this option is not the correct answer.

Awkward:
- Awkward refers to a lack of coordination, clumsiness, or discomfort in movements or social interactions.
- It suggests a lack of gracefulness or smoothness in actions or behavior.
- This option is the correct answer as it is the opposite of graceful and accurately represents the antonym of the given word.

In conclusion, based on the given options, the correct answer for the antonym of graceful is option 'D', which is "Awkward".