Bachelard, I realized, is correct. The contemplation of words themselves leads to reverie, to thinking about thinking, to making dreamlike concatenations that chug through the consciousness and lead to imagination. His example involves contemplations and imaginings about the genders of words and how they suggest all kinds of interweavings and reactions, but noun gender need not be the motivating inspiration. For me, etymology accomplishes the same ends.
Reverie Ann E. Michaels on Bachelard and reverie