clarify
verb (used with object)
to make (an idea, statement, etc.) clear or intelligible; to free from ambiguity.
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The outcome of his efforts had been clarifying.
From The Gray Dawn by Stewart Edward White