The question asks us to find the word that is most similar in meaning to the underlined word "magnificent" in the sentence "We had a magnificent dinner at the birthday party."

Let's understand the meaning of "magnificent". When something is described as magnificent, it means it is extremely beautiful, elaborate, or impressive. In the context of a dinner, a magnificent dinner would be one that is lavish, grand, and excellent in quality, making a strong positive impression.

Analysing the Options for Similar Meaning

Now let's look at the given options and their meanings:

• splendid: This word means excellent, wonderful, or very impressive. It is often used to describe something that is grand, beautiful, or of high quality.
• miserable: This word means very unhappy or uncomfortable. It can also describe something that causes unhappiness or discomfort, or something that is very poor in quality. This is the opposite of magnificent.
• inedible: This means not fit to be eaten. This relates to whether food can be consumed, not its quality or impressiveness in a positive sense.
• unhealthy: This means likely to cause illness or not good for health. While a magnificent dinner might potentially be unhealthy due to being rich or excessive, the word "magnificent" itself describes its grandeur and impressiveness, not its health implications.

Finding the Closest Synonym for Magnificent

Comparing the meanings:

• "Magnificent" describes something grand, impressive, and of high quality.
• "Splendid" describes something excellent, wonderful, and very impressive, often implying grandeur or high quality.
• "Miserable" means unhappy or poor quality.
• "Inedible" means not fit to eat.
• "Unhealthy" means bad for health.

The word "splendid" has a meaning that aligns very closely with "magnificent," especially in the context of describing something like a dinner. Both words convey a strong sense of positive impression, excellence, and grandeur.

Therefore, "splendid" is the word most similar in meaning to "magnificent".