Step 1: Understand the first pair of words.
The word taciturn means someone who is quiet or speaks very little, whereas garrulous means someone who talks excessively.
Thus, the relationship between TACITURN and GARRULOUS is that of opposites (antonyms).
Step 2: Apply the same relationship to the second word.
The word insolvent refers to a person or organization that is unable to pay its debts.
The opposite of insolvent is solvent, which means having enough assets or money to meet financial obligations.
Step 3: Conclusion.
Since the relationship in the first pair is antonyms, the correct corresponding word for INSOLVENT is its antonym, which is solvent.