From the given options, select the word that is opposite in meaning to 'Excruciating':

The correct option is Mild.

To find the word that is opposite in meaning to "Excruciating", we can analyze the definitions of the words:
1. Excruciating: This word is an adjective that means extremely painful, severe, or intense (e.g., "excruciating pain"). It represents the highest level of severity or intensity.

2. Mild: This word is an adjective that means gentle, moderate, or not severe (e.g., "mild weather" or "mild pain"). Since it represents a low level of intensity, it is the direct opposite in meaning to "excruciating".

Let's look at why the other options do not fit:
- Sophisticated: Means complex, refined, or highly developed. It has no relation to physical or emotional intensity.
- Modern: Relates to present or recent times rather than the past.
- Noisy: Means making a lot of loud or unpleasant noise.

Therefore, "Mild" is the correct antonym (opposite word) for "Excruciating".