Concept:
Many vocabulary questions can be solved by understanding the context of the sentence. Words such as though, although, and but often indicate a contrast between two ideas.
Step 1: Analyze the sentence.
The sentence states:
Though a great scholar, he is quite unassuming.
The word though suggests contrast. Even though the person is highly educated and knowledgeable, he does not behave in a proud or boastful manner.
Step 2: Understand the meaning of "unassuming".
The word unassuming means:
• humble
• modest
• not arrogant
• not seeking attention or praise
Step 3: Evaluate the options.
• Showy: Seeking attention through appearance or behavior.
• Proud: Having a high opinion of oneself.
• Modest: Humble and not boastful.
• Arrogant: Having an exaggerated sense of self-importance.
Only modest has the same meaning as unassuming.
Hence,
\[
\boxed{\text{Modest}}
\]